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The optical and thermal properties of a new class of fluoroindate glass with different erbium contents were investigated via Raman, transmission, and fluorescence spectroscopies, fluorescence decay curve analysis, and differential scanning calorimetry. The strength parameters of the samples were calculated using the Judd–Ofelt theory. The mid-infrared luminescence properties of erbium-doped fluoroindate glasses were studied, and a strong emission at 2.7 μm was obtained. Compared with the traditional ZBLAN glass, this glass has excellent emission properties, especially a longer fluorescence lifetime (7.09 ms) and larger emission cross-section (6.95 × 10−21 cm2) at 2.7 μm. The results indicate that fluoroindate glass is an attractive host for mid-infrared lasers and as a gain medium for optical amplifier applications.

Hydroxyethyl cellulose (HEC) doped with 3 wt% erbium nitrate film was prepared by casting from solution. The effect of plasma treatment on optical properties of composite film was investigated. The optical absorbance was measured in the wavelength region of 200–800 nm. . Electronic transition was proved to be direct allowed for pristine and plasma treated film. Tauc’s plots were used to determine the optical band gap (Eopt) of the samples under study. The energy gap was 5.30 eV for untreated composite film and the treated samples at 10, 20 and 30 min have lower values of optical band gap, 5.22, 5.20 and 4.90 eV respectively. It was also found that the Urbach energy values (Ee) were decreased under different plasma treatment times. It begins with 1.46 eV for untreated sample till it reaches 0.72 eV for 30-minute treated sample. Wemple–DiDomenico model parameters such as, oscillator energy, dispersion energy and zero-frequency refractive index values were calculated and their variations with plasma were studied. The color parameters for composite film are noticeably affected under plasma treatment.

An effort, investigate the photophysical belongings on pyrin-3-amine with 1-acetyl-2, 4-dihydroxybenzene Schiff base Erbium, and Ytterbium multiplexes have been created then categorised in spectroscopic methods identical UV, FTIR, Fluorescence, then Nuclear magnetic resonance spectroscopy. Proved thermal characterization of Schiff base metal complexes was to have high thermal stability by the TGA-DTA technique. Erbium and Ytterbium complexes have high luminescence in nature compared to a free ligand. A bioimaging study with Schiff base metal complexes is fluorescent staining dyes. It is appreciated quality in low cytotoxicity, simple preparation, photostability, and smudged cytoplasm structure. The quantum yield of lanthanides contributes to the brightness of Schiff base rare earth elements. The aim on molecular constructions limits intermolecular metal-ligand connections.

Highlights • Fluoride alone increased the microhardness of the enamel surface. • Fluoride alone halted the progression of enamel erosion. • Laser irradiation before fluoride-induced similar effects as fluoride alone. • Laser irradiation alone did not prevent the progression of enamel erosion., Objective Increasing enamel resistance to acid may be useful for preventing cavitation and could reduce changes in the enamel’s microhardness. Topical fluoride application and laser irradiation promote acid resistance of dental substrates. The aim of the study was to assess the efficacy of erbium, chromium: yttrium-scandium-gallium-garnet laser irradiation in combination with fluoride application to control enamel erosion. Design Sixty human premolar specimens were prepared (N = 60) and were randomly assigned to 5 groups, twelve specimens in each group (n = 12/group) according to surface treatment. The groups were as follows: group 1 (C): control with no treatment; group 2 (F): application of 1.23% acidulated phosphate fluoride gel alone; group 3 (L): laser irradiation alone; group 4 (F+L): acidulated phosphate fluoride gel followed by laser irradiation; group 5 (L+F): laser irradiation followed by acidulated phosphate fluoride gel. All the specimens were eroded 10 min in citric acid. Baseline measurements were performed using a Vickers microhardness tester before surface treatment. Subsequently, all specimens were subjected to a 60 min erosion-remineralization cycle for five days followed by measurements of the final surface microhardness. Statistical comparisons were performed by a one-way analysis of variance and Tukey’s post hoc analysis. Results The control, laser, and fluoride + laser groups showed a statistically significant decrease in microhardness values between baseline and post-erosion measurements (P

The crystallization kinetics of erbium-substituted yttrium aluminum garnet (Er:YAG) from the amorphous phase was studied depending on the degree of substitution of yttrium by erbium: (Y1-xErx)3Al5O12, x = 0 – 0.9. The corresponding series of nanopowders were synthesized using the sol-gel method with binary sols as the starting materials. Crystallized single-phase Er:YAG powders were obtained at temperatures as low as 1370 K through the formation of intermediate phases. The crystallization kinetics of the Er:YAG precursors was analyzed using non-isothermal differential scanning calorimetry and X-ray diffraction analysis. The proposed unified crystallization model, based on which the kinetic parameters of the crystallization process of the Er:YAG from the amorphous phase were determined, depending on the content of erbium oxide. Time-temperature-transformation curves were developed from the obtained data to determine the optimal modes in the heat treatment and sintering of optical ceramics. Er:YAG transparent ceramics were obtained by vacuum sintering of sol-gel powders.

Dinuclear ytterbium and erbium based bifunction complexes Ln2L2(depma2)Cl2 (1-Ln, Ln = Yb and Er, H2L = N1,N3-bis(salicylideneimino)diethylenetriamine, depma2 = dimerized 9-diethyl-phosphonomethylanthracene) are reported. They undergo thermo-induced consecutive phase transitions, first the dissociation of depma2 ligand forming LnL(depma)Cl (2-Ln) and then the release of chloroethane forming LnL(epma) (3-Ln, epma = 9-ethylphosphonomethylanthrancene). The structural transformations are accompanied with synergetic switch of the luminescence in visible and NIR regions and also magnetic dynamics.

The understanding of complex relationships between luminescent properties, local symmetry of an emitting center, and the host crystal structure provides a better insight into optical properties of materials. In this work, the alkaline earths CaF2 and BaF2 fluoride crystals doped with 0.1 mol% ErF3 were investigated. The crystals structure has been studied using a synchrotron and laboratory X-ray diffraction. The C3v and C4v sites symmetry were determined using erbium probed high resolution emission spectroscopy (HRPL) at low temperature (LT) of 10 K. The considerable difference in room temperature (RT) optical properties for CaF2 compared to BaF2 crystals was observed. Such difference in absorption intensity of 4.7 times of erbium 4G11/2 manifold in UV, and 7.5 times in green emission from 4S3/2 manifold, could be due to the distinction in the host crystals cationic radius (ΔrCa,Ba) and the dopant-host ionic radius (ΔrCa-Er, ΔrBa-Er). Those Δr differences influence the structure and lead to the following symmetry formation: In CaF2, the C4v and C3v isolated centers were identified, with the determined Er3+- F−i bond lengths of 2.734 Å and 4.735 Å respectively; In BaF2, only C3v isolated centers were identified with the determined Er3+- F−i bond lengths of 5.380 Å. The present work is the first study that takes into account correlations of optical properties, the local symmetry and the structure in mentioned fluorides crystals, and it could be a step forward in the lanthanide doped optical materials systematics.

In this paper, the layered (Gd1-xErx)2(OH)5NO3·nH2O (LGEH) with a variable content of erbium were synthesized by controlled double-jet precipitation (CDJP) at a constant pH value. The effect of pH co-precipitation on the morphology, crystallinity, porosity of the LGEH, as well as on the spectral-luminescent properties of oxide nanophosphors obtained by their heat treatment is significant. We have found that the samples with the lowest disordering and the highest of photoluminescence (PL) intensity of Er3+ ions are obtained from amorphous sponge-like precursor co-precipitated at pH 9.5. The PL of nanostructural (Gd1-xErx)2O3 depends on both structural-morphology properties and samples composition. It was also found that efficiency of radiative and non-radiative relaxation channels for excited Er3+ ions mainly depends on three factors: nanocrystals size, specific surface area and erbium concentration. For explanation of the PL behavior in the green and red spectral ranges, the energy diagram showing the intracenter energy transitions and intercenter energy migration in synthesized nanophosphors was proposed.

Present paper reports on the study that deals with the distinctiveness of compound polymers compounds. Here present work includes the material description utilization, experimental results and test results of physical, mechanical and microstructure of “Epoxy” and “polypropylene” where the compounds that are filled by micro sized erbium oxide particles. The experimental result also includes the growth of hypothetical heat conveyance model depended on mathematical correlation that is projected for approximation of efficient thermal conduction of polymer compounds by uniform distribution of micro sized particle fillers. The correlation has been validated for Erbium oxide filled polymer by numerical analysis and experiment. The report states the study of “EPOXY” and “POLYPROPYLENE” compounds that regards the thermal characteristics of glass transition temperature (Tg) and coefficient of thermal expansion (CTE) that mutually effects the Erbium content on properties of EPOXY and POLYPROPYLENE.

This work reports on the analysis of structural and spectroscopic properties of the fluoroindate glasses co-doped with Er3+/Ho3+. Structural analysis showed that erbium and holmium ions were modifier ions and depolymerizedof the fluoroindate glass network. The energy transfer processes between rare - earth ions in fluoroindate glasses pumped by and 980 nm laser diode have been also examined. Due to partial Er3+ → Ho3+ energy transfer and superposition of Er3+: 4I11/2 → 4I13/2 (2.77 μm)+ Ho3+: 5I6 → 5I7 (2.85 μm) radiative transitions in fluoroindate glass co-doped with 0.8ErF3/1.6HoF3, a broadening 3 μm luminescence (Δλ= 201 nm) was obtained. The overall energy transfer efficiency ηET1 + ηET2 was calculated to be 95% indicating efficient sensitization of the holmium ions by erbium.

With the rapid development of the machinery industry, bearing materials with better tribological properties are demanded. Al alloys containing Erbium (Er) and Zirconium (Zr) have better comprehensive performance, whose tribological properties have hardly been reported before. In this work, dry sliding wear tests were performed on the Al–Sn and Al–Sn–Er–Zr alloys in two different annealing states to study the effect of trace Er, Zr on the tribological properties of the Al–Sn alloys. The Al–Sn–Er–Zr alloys showed better wear resistance than the Al–Sn alloys, which was mainly due to the higher hardness and strength of the Al–Sn–Er–Zr alloys. The wear losses of the alloys annealed at 375 °C for 100 h at the load of 70 N were significantly lower than those of the alloys annealed at 300 °C for 4 h. The wear coefficient K of the alloys annealed at 375 °C for 100 h decreased with the increasing load. The Al–Sn–Er–Zr alloys showed smoother worn surfaces than the Al–Sn alloys. With the load increasing, the wear mechanism changed from abrasive wear, mild adhesive wear and slight delamination wear to severe adhesive wear and delamination wear. The wear scars of different samples under the same load were similar, indicating that the addition of trace Er, Zr and annealing process did not change the wear mechanism. All samples experienced cracks and voids in the tribolayers. And oxygen accumulated in these defects. Most wear debris were lamellar, which was related to the adhesive wear and consist with the delamination theory.

In this work, controllable hexagonal holes and distributed Er2O3/Er2O3- graphene particles are fabricated on silicon wafers using a straightforward, hydrofluoric, acid-free, and strong alkali-free hydrothermal method. As long as erbium nitrate hydrate and urea coexist in the reaction mixture, silicon wafers can be synthesized successfully using controllable hexagonal hole structures that are regulated by hydrothermal temperature and the addition of graphene oxide and hexadecyl trimethyl ammonium bromide to the reaction mixture. Correspondingly, the wettability of these silicon wafers also is controllable due to the structure that can be changed from hydrophilic (89.3°) to superhydrophobic (153.1°). In short, this work not only provides a simple and nontoxic approach for preparing hexagonal hole structured silicon wafers, but also produces superhydrophobic silicon wafers that potentially can be applied for corrosion-resistant coatings, oil-water separation, and other fields.

Spectral-luminescent characteristics of erbium ions in photo-thermo-refractive (PTR) glasses doped with different concentrations of ytterbium and erbium oxides were investigated in this work. X-ray diffraction pattern of studied glasses was carried out. Judd-Ofelt parameters of intensity Ωt were obtained and used for deriving emission cross-sections and radiative lifetimes. It was found that the peak emission cross-sections values at a wavelength of 1.53 μm obtained from F-L and McCumber methods are 0.59 × 10−20 cm2 and 0.60 × 10−20 cm2, respectively, which are very similar and compared with those of silicate glasses. A quite high value of quantum yield at the wavelength of 1.53 μm for the sample with 0.1 mol% Er2O3 co-doped with ytterbium oxide has been investigated. Energy transfer efficiency from ytterbium ions to erbium ones was found to be 80% and 86% for erbium- and 1 mol% and 2 mol% Yb2O3-co-doped PTR glass, respectively. Laser properties of 2Yb-01Er PTR glass were carried out. The gain spectrum starts to be positive when the population inversion parameter gets to 0.5. Laser action was demonstrated at room temperature. It was found that the round-trip losses of the Er/Yb-PTR element are 0.28%.

Trivalent erbium ions doped Bi2O3-B2O3 transparent glass ceramics containing CaF2 were prepared and characterized through X -ray diffraction, scanning electron microscopy, Fourier transform infrared absorption, optical absorption, and near infrared emission for 1.53 μm fiber lasers. The glass ceramics obtained by applying thermal treatment at 575 °C for 5 h and 575 °C for 10 h contain Bi3B5O12 and CaF2 crystallites. The Judd-Ofelt theory was applied to evaluate various spectroscopic and laser characteristic properties. The NIR emission corresponding to the 4I13/2 → 4I15/2 (∼1.53 μm) transition was studied by exciting the samples at 514.5 nm laser radiation. The stimulated emission cross-sections of ∼1.53 μm luminescence were also obtained applying the Mc Cumber theory. The experimental results confirm that the transparent glass ceramic obtained at a thermal treatment of 575 °C for 10 h is more suitable to design fiber lasers for diverse applications in the fields of industry, medicine and scientific research.

Diagnosis and imaging play an essential key role in primary detection, screening, and image-guided smart nanomedicine for healthcare solutions. This study illustrates the successful fabrication of luminescent lanthanide (erbium)-doped hydroxyapatite (Er-HAp) by one step facile wet-chemical precipitation method. The chemical compositions, morphology, optical, and biological properties were systematically characterized using relevant different structural, compositional analytical instrumentation and cytotoxicity assays. After erbium doping, synthesized luminescent nano-structured materials exhibited elongated morphology, with well dispersed

Excitation functions for the natEr(d,x)163,165,166,167,168,170Tm and natEr(d,x)171Er nuclear reactions were measured from the respective thresholds up to 24 MeV by using a stacked-foil activation technique combined with HPGe γ-ray spectrometry. Measured data show a partial agreement when compared with the available literature data, theoretical data extracted from the TENDL-2019 library, and predicted data by the model code EMPIRE-3.2.2. Estimated physical thick target yields of the reaction products show close values to the directly measured ones available in the literature. The deduced yield curves indicate that a typical irradiation (Ed = 15 MeV, Id = 100 µA, tirr = 72 h) of enriched 167Er target by a low energy deuteron cyclotron is suitable to obtain more than a hundred GBq activity of 167Tm with negligible impurity from 168Tm. Measured data of 170Er(d,p)171Er reaction have great significance to improve the predicting capability of the model code.

A series of Erbium substituted X-type Ba2Co2ErxFe28-xO46 (x = 0.00, 0.04, 0.08, 0.12, 0.16, and 0.20) hexaferrites were prepared by the method of heat treatment. The obtained precursors were heated at 1350 °C for 6 h. XRD investigation reveals that x = 0.0 sample possesses X, W-type, and α-Fe2O3 phases, while Er- substituted samples show presence of X and W phases. The room temperature Mossabuer spectra have been fitted with five sextets. A variation in saturation magnetization (MS) is explained and supported by the Mossbauer spectroscopy. The maximum values of MS (52.29 Am2/kg) and anisotropy field-Ha (1370 kA/m) are found for x = 0.12 composition. Similarly, the maximum relative area (~69%) for spin up sites (k+a+b) is also found for x = 0.12 composition. Low frequency (20 Hz–2 MHz) dielectric response of all samples show normal behavior of ferromagnetic materials. The dielectric measurements reveal that the conduction in low frequency is due to grain boundary contributions and at the higher frequency it is due to grain contributions. AC conductivity is found to increase with frequency in all prepared hexaferrites. The substituted compositions can have potential applications in filter application due to soft ferrite behavior and low dielectric loss tangent.

In this work, the celebrated (2+1)-dimensional Kundu–Mukherjee–Naskar equation (KMNE) proposed to govern the soliton dynamics in (2+1)-dimensions along excited resonant wave guides that is doped with Erbium atoms is studied with the aid of ansatz approach and sine-Gordon expansion method (SGEM). The integration algorithms revealed both single and combined optical solitons of the model. These solitons are reported as bright, dark, combined dark-bright and singular solitons. The combined dark-bright and combined singular soliton solutions of the KMNE are to the best of our knowledge reported for the first time in this paper. These solutions supplements the existing ones in the literature. Additionally, we studied the conservation laws (Cls) of the equation by applying the multipliers approach and report the non-trivial fluxes associated with the equation. The physical structure of the obtained solutions are shown by graphic illustration in order to give a better understanding on the dynamics of optical solitons.

Structural and optical characterization of sol-gel assisted spin coated ErFeO3 thin film is demonstrated. ErFeO3 thin film is deposited on quartz substrate at 3000 rpm from the sol prepared using metal nitrates dissolved into suitable solvents at a pH level of 2–3. X-ray diffraction and Raman spectroscopy analysis confirmed the perovskite orthorhombic structure of ErFeO3 thin film with a space group of D2h16 – Pbnm. Debye-Scherrer’s equation was employed on the strong XRD peak and average crystallite size was calculated to be 73 nm. A compressive strain of −13.66% was recorded from XRD data. The Raman modes are found shifted from the standard reported literature, which are due to the substrate induced strain in the deposited film. AFM investigations have shown good quality of the ErFeO3 thin film with average roughness of 18 nm and grain size of 410 nm. From the optical measurement, the film transmittance in 300–1000 nm range was 60–75% and the optical bandgaps of ErFeO3 is calculated to be 3.8 eV.

Erbium doped Phosphate glasses with composition 70%V2O5.(30-x)%P2O5.x%Er2O3, where x = 0, 0.2, 0.4, 0.5, 0.7 and 0.9, were prepared by melt quenching technique. The structural properties of all prepared glasses are investigated by XRD, density, molar volume and FT-IR techniques. X-ray diffraction pattern confirms the amorphous nature of all samples, except for the heavy Er3+ doped glasses which exhibit a partial crystallization. The density of the glasses is found to increase while the molar volume decreases with increasing Er2O3 content. Physical properties, such as OPD, field strength, average crosslink density, bond stretching force and the number of bonds per unit volume have been discussed. FT-IR analysis reveals a decrement in the intensity of the symmetric vibration modes of PO4 groups with an associated increment in the intensity of the asymmetric modes with introducing Er2O3. The characteristic temperatures and thermal stability of the glasses are investigated by using DTA measurement. In addition, the lattice thermal conductivity is found to increase from 0.325 to 0.54 W/m.oC with increasing the mol% Er2O3. Emission spectra of wavelengths 510, 545 and 585 nm are detected from all the Er doped samples when exposed to a light of wavelength 365 nm. The grown crystals are found to enhance the PL intensity due to the light scattering effect.

Background Complete removal of existing composite restorations without unnecessary removal of tooth structure is challenging. The authors compared the amount of tooth structure removed and composite remaining in Class III preparations when using an erbium laser or a rotary instrument. Methods Mesiolingual and distolingual preparations were prepared in 14 extracted anterior teeth, restored with shade-matched composite, finished, and polished. One restoration was removed with an erbium, chromium:yttrium-scandium-gallium-garnet laser and the other with a rotary instrument (handpiece and carbide burs). Gypsum models made from vinyl polysiloxane impressions of the preparation and removal stages were scanned. The 2 scans were precisely aligned to calculate the amount of tooth structure removed and residual composite, which were statistically compared (t test) between the bur and laser groups. Results Rotary instruments removed significantly more tooth structure than the laser in terms of mean depth (P = .0017) but not maximum depth (P = .0762). Although mean depth of tooth loss was smaller in the laser group, the area of tooth loss was significantly larger (P = .0004) because the rotary instrumentation left significantly more composite than the laser in terms of volume (P = .0104), mean depth (P = .0375), maximum depth (P = .0318), and area (P = .0056). Conclusions and Practical Implications The erbium, chromium:yttrium-scandium-gallium-garnet laser was more selective in removing existing composite restorations than a rotary instrument because it removed less tooth structure and left behind less composite. Unintentional loss of tooth structure and unnoticeable residual composite are inevitable when removing existing composites. Erbium lasers are alternative means of composite removal that may be more selective than a rotary instrument.

In this paper, we propose and experimentally demonstrate quadruple Brillouin-shift wavelength spacing (˜0.33 nm, ˜40 GHz) utilizing multiwavelength Brillouin–Erbium fiber laser (MBEFL) cavity. High Brillouin pump (BP) power, Pre-amplification technique, and capturing the residual pump power using wave selective coupler (WSC) are used to enhance laser comb tunability. The proposed structure has a tuning range of 60 nm (1530 nm–1590 nm) in the absence of self lasing cavity modes. Four stable Brillouin Stokes with high output power are achieved at 20mW and 225mW of BP and 1480 nm pump power respectively. In addition, multi-output ports with quadruple channel spacing is presented. This wide channel spacing make the proposed structure has strong potential to be used in dense wavelength division multiplexing (DWDM) communication systems.

The objective of the study was to evaluate the effect of the erbium:yttrium aluminum garnet (YAG) laser on diabetic foot ulcers (DFUs) that had not responded to standard care. We retrospectively evaluated 22 nonhealing DFUs that received at least 4 weeks of standard wound care, demonstrated poor healing response, and subsequently were treated with an erbium:YAG laser. We measured the percent wound area reduction (PWAR) for the 4 weeks before initiating laser therapy and the PWAR for 4 weeks after the initiation of laser therapy. Erbium:YAG laser treatment consisted of 2 components: debridement and resurfacing. The laser settings were the same for all treatments. We used the paired t test to compare pretreatment with posttreatment wound area reduction. During the 4-week period before the initiation of laser therapy, the average PWAR was –33.6%. Four weeks after initiating treatment with the erbium:YAG laser, the average PWAR was 63.4% (p = .002) and 72.7% of wounds had ≥50% PWAR. By 12 weeks, 50% of wounds had healed. Erbium:YAG laser therapy accelerated DFU healing in a cohort of patients with ulcers that had been unresponsive to standard of care therapy.

Harvesting solar energy demands efficient solar cells working over the largest region of the solar spectrum possible. The extension of the wavelength region is viable through the use of frequency converting phosphors. Rare earth (RE) pairs fulfill this criterion and in particular the Erbium/Ytterbium pair allows a good coverage from the near-infrared (NIR) to visible by up conversion (UC) at room temperature. In this study we report the structural and optical properties of aluminosilicate glass films grown by sol-gel (SG) spin-coating deposition technique and co-doped with (Er, Tb)/Yb by ion implantation with different fluences and energy. After implantation, the films were annealed at 1000 °C for 20 min and characterized by scanning electron microscopy (SEM), Rutherford Backscattering (RBS), X-ray diffraction (XRD) and Photoluminescence (PL). The annealing induces a significant redistribution of the RE ions in the films. In particular, the samples implanted with Tb + Yb show a tendency to form a homogeneous distribution over the entire film. In both cases PL shows the cooperative up conversion process.

Arginine is an important amino acid in humankind bodies and is of essential clinical significance. This paper presents a novel bioprobe based on fluorescence resonance energy transfer (FRET), which can be used to detect arginine efficiently and economically. In this bioprobe system, positively charged up-conversion phosphor NaYF4 (NYF) acts as energy donor, and negatively charged gold nanoparticle (AuNP) acts as energy acceptor. The oppositely charged donor and acceptor come into close proximity through electrostatic attraction effect, which results in the occurrence of FRET between NYF and AuNP. The FRET process is thus in the “on” state, meanwhile the system is in the “off” state, and the emitting light of NYF quenched. When positively charged arginine is added into the system, the guanidyl of arginine binds to AuNP and leads to the negatively charged AuNP becomes positively charged one, and the AuNP separates from NYF because of the electrostatic repulsion. The FRET process is blocked and the system switches to the “on” state because the distance between NYF and AuNP becomes longer. In the “on” state, the intensity of the restored emitting light is proportional to the concentration of arginine. This approach brings a good linear relationship between the fluorescence intensity and the concentration of arginine in the concentration range of 14.42–115.04 μM. The limit of detection is as low as 2.9 μM. A new method for quantitative determination of arginine by just measuring the fluorescence intensity of the system is established.

We have employed the solid-state chemical reaction to construct series of trivalent erbium ions activated NaLaP 4 O 12 (abbreviated as: NLP) phosphors. The structural investigation indicates that NLP:Er 3+ crystalline products are purely monoclinic phase with micron particles. Trivalent erbium ions with the substitution for lanthanum are successfully inserted into NLP host lattice. The UV–Vis diffuse reflectance absorption performance, doping Er 3+ content-dependent downconversion photoluminescence, content quenching mechanism were reported in this paper. Upon near UV (378 nm) excitation, yellow/yellow-green visible light with the dominant 4 S 3/2 → 4 I 15/2 emission of trivalent erbium is displayed. Yellow-green emitting NLP:2%Er 3+ sample has the maximum intensity and main luminescent peaks at 541 and 549 nm. The content quenching is related to the dipolar interaction. Additionally, the detailed investigation on CIE chromaticity coordinates, CP and CCT reveals that the title product has promising application in the field of white LEDs excited by near UV light.

Selective separation of heme proteins and peptides from complicated biological samples before comprehensive identification and characterization of intact biomolecules which are low stoichiometry is indispensable for ongoing proteomics. Here, three magnetic mesoporous rare-earth silicate (rare-earth = Er, Tm, Yb) microspheres prepared by facile solvothermal method were used as novel adsorbents for the selective isolation of bovine hemoglobin (BHb), and magnetic mesoporous ytterbium silicate showed apparent adsorption efficiency in isolating BHb with a adsorption capacity of 304.4 mg/g after the comparison. The retained BHb could be eluted by using Na2CO3 as stripping reagent. Meanwhile, Circular dichroism spectra illustrated that the microspheres posed no effect on the secondary structure of BHb. The resultant magnetic particles were characterized by transmission electron microscope, scanning electron microscope, x-ray powder diffraction, vibrating sample magnetometer, Fourier transform infrared spectroscopy, N2 adsorption−desorption isotherm and zeta potential. The as-prepared magnetic microspheres showed high specificity for the separation of BHb from bovine plasma as corroborated by SDS-PAGE and MALDI-TOF MS analysis, which would be expected to possess potential application in isolation of other heme proteins in complex biological samples.

Topical application of pentoxifylline (PTX) would enable targeted treatment of radiation-induced skin fibrosis. However, PTX is hydrophilic with limited partitioning into the stratum corneum. The objective of this study was to investigate whether use of Erbium:YAG fractional laser ablation and different topical dosage forms (solution, hydrogel and patch) could be used to improve PTX cutaneous delivery as opposed to transdermal permeation. Initial results confirmed that fractional laser ablation significantly increased PTX delivery from each dosage form compared to passive controls. Delivery efficiencies of ∼ 30% were achieved with each dosage form but a large proportion of PTX permeated across the skin; thus, fluences were decreased to create shallower micropores, their depth being linearly dependent on fluence. The hydrogel was selected as the optimal formulation and PTX delivery efficiencies were further increased (44%-67%) by reducing the amount of hydrogel applied (better mimicking conditions of use). As this resulted in PTX depletion in the formulation, a loss of dependence of delivery on laser fluence was observed. These findings suggest that fractional laser ablation at moderate fluences enables an effective and targeted cutaneous delivery of PTX from a hydrogel formulation, which can be easily produced without the need for complex equipment.

The aim of this study was to evaluate combined efficacy of methylene blue mediated antimicrobial photodynamic therapy (a-PDT) using 660 nm diode laser versus Er, Cr: YSGG laser as an adjunct to scaling and root planing on improving the Probing depth (PD), Clinical attachment level (CAL), Plaque Index (PI) and Gingival Index (GI).clinical parameters in Supportive periodontal therapy.In this split-mouth, double-blind, randomized controlled trial, we compared a-PDT versus Er,Cr:YSGG as an adjunct to scaling and root planning (SRP) with SRP alone in Supportive periodontal therapy. A total of 36 subjected were enrolled. In each patient, two quadrants constituted the control group (Group I - Scaling and root planing SRP alone), one site in other quadrant constituted the test group 1 (Group II - SRP followed by application of Er, Cr: YSGG laser), and another site in different quadrant constituted the test group 2 (Group III - SRP followed by antimicrobial Photodynamic therapy using diode laser). The diode laser was operated at a peak power of 70 mW using a 0.6 mm diameter fiber-optic tip. Each site was irradiated with a power density of 28 mW/cmThere were no significant differences between participants for clinical parameters at baseline. PI, GI PD, and CAL significantly improved at 3 months follow up compared to baseline in both the study groups (Group II - SRP + Er,Cr:YSGG, Group III - SRP + a-PDT) with P 0.05. Adjunctive use of Er,Cr:YSGG laser with SRP showed better clinical outcomes than a-PDT with SRP.Nonsurgical periodontal therapy of chronic periodontitis using Er, Cr: YSGG, and a-PDT as an adjunct to SRP was significantly more effective than SRP alone in reducing PD, CAL, GI, and PI at 3 months follow up. Adjunctive use of Er,Cr:YSGG laser with SRP showed better clinical outcomes than a-PDT with SRP. However, the long-term positive benefits of the laser therapies are yet unknown and more research with longer follow-ups are required.

In this work, a numerical and theoretical model for erbium doped seven-core fiber amplifier for amplifying a band of the input signals was developed. The gain obtained is enhanced by enlarging a core size. A large band of signals was amplified in each core with a gain higher than 20 dB and a noise low than 6 dB.

Erbium nano particles (NPs) doped tellurite glasses were prepared via melt-quenched technique and their chemical composition are as follows; {[(TeO2) 0.70 ( B 2 O3) 0.30 ] 0.7 (ZnO) 0.3 } y (Er2O 3 NPs) 1−y , y = 0.005, 0.01, 0.02, 0.03, 0.04 and 0.05. The amorphous state of the glass system was revealed and the structural parameters indicating the formation of non-bridging oxygen was shown. The current work underlines the spectral parameters from Judd–Ofelt (JO) studies, and upconversion spectra. The existence of erbium NPs was found experimentally using transmission electron microscopy (TEM). The Judd–Ofelt analysis suggests that the radiative probability, A rad is strong at 2H 11∕2 —> 4I 15∕2 and a longer lifetime at 4I 11∕2 —> 4I 15∕2 . The Argon laser beam was used to determine the upconversion emission peaks. The upconversion radiation emission excited at 800 nm was found in the range 390 nm.

The present spectral investigations on erbium doped barium lithium fluoroborate glasses of the composition (70-x) H3BO3 − 10 Li2CO3 − 10 BaCO3 − 5 CaF2 − 5 ZnO − x Er2O3 (where x = 0.05, 0.1, 0.5, 1, 2 in wt %) were prepared by the conventional melt quenching technique. Dielectric constant, refractive index, electronic susceptibility, reflection loss and interionic distance were calculated for all the glass samples. The X-ray diffraction spectrum confirmed the amorphous nature of the prepared glasses. The optical properties of the prepared glasses were investigated by UV–Vis-NIR absorption and emission spectra. Nephelauxetic ratio and bonding parameters were determined from the absorption spectra and are found to be covalent in nature. Optical bandgap corresponding to the direct and indirect allowed transition were calculated to understand the electronic band structure and the Urbach energy values. Judd-Ofelt (JO) intensity parameters (Ωλ = 2, 4 and 6) were determined from the absorption spectrum. These JO parameters were used to analyse the transition probability (A), branching ratio (βR), and the stimulated emission cross section ( σ P E ) parameter for different emission intensities. The emission of infrared at 1550 nm indicates that the glass material can act as a promising wave guide laser source and is suitable in optical fiber amplifier applications.

Regulating green electroluminescence (EL) of ZnO is an important but difficult task to produce white-light sources due to its strong background green emission. We have demonstrated that the green EL from solution-processed ZnO nanocrystals (NCs) can be improved and manipulated by erbium (Er) doping. Er3+ ions can be doped and activated without any high-temperature post-annealing treatment. Incorporation of the Er3+ ions in the ZnO host induces lattice expansion primarily along the (002) direction. Er3+-related characteristic green emissions are observed at 535 and 556 nm and manipulated with increasing Er concentration under forward bias. The EL mechanism is investigated and found to be driven by the energy transfer from the deep-level defects of the ZnO NCs to the nearby Er3+ ions. Our findings have demonstrated the feasibility of producing green light-emitting diodes by solution-processable Er-doped ZnO NCs and inspired a promising way to develop white-light sources based on printable ZnO NCs simply by incorporating different rare earth ions into the ZnO NCs simultaneously.

We propose and demonstrate an enhanced multiwavelength Brillouin-Erbium fiber laser by utilizing double linear cavity based on a double-pass pre-amplification technique. This simple structure is composed of two 24 km and 24.2 km single mode fiber (SMF) coils and two segments 13-m Erbium doped fibers (EDF). In order to obtain the Brillouin gain under low external injection Brillouin pump power, the BP is amplified in the linear cavity before entering into the SMF. In this experiment, so as to obtain the most Stokes lines, the optimization of 980 nm pump power and tunable laser source (TLS) power together with its corresponding wavelengths is very important. When setting the TLS power as 7.4 dBm and 980 nm pump power as 300 mW, a total of 51 Brillouin Stokes lines with frequency spacing of 0.089 nm are produced.

We demonstrate that the upconversion nanoparticles (UCNPs) fluoresce 50 times more on a gold (Au) coated Cicada wing. UCNPs are attractive bioimaging, and therapeutic materials as it is excited in the infrared, limited only by the low fluorescence quantum yield. Here, a plasmonic effect, coupled with an anti-reflecting (AR) Cicada wing substrate coated with Au is demonstrated to enhance the fluorescence of the UCNPs. Silica (SiO2) coated Erbium doped green emitting core-shell UCNPs (NaYF4: Yb3+, Er3+@SiO2) show conventional metal enhanced fluorescence. The AR property of the Cicada wing (R ~0.2% @ 1000 nm) contributes >6-fold enhancement as compared to flat (silicon, and quartz) substrates (R~10–30% @ 1000 nm). Upon plasmon coupling, with an optimally sputtered Au coating, an unprecedented enhancement of >50-fold for the 520, and 655 nm emission was obtained on the Au coated Cicada wings, vis-a-vis planar uncoated (silicon, and quartz) substrates. The enhancement was also confirmed by direct fluorescence imaging of the photonic substrates used. The fluorescence lifetime of the core, and the core-shell UCNPs (~300 μs) decreased by ~30–40%, and 10–30%, respectively, when placed on Au coated substrates.

Objective: This prospective study presents a preliminary result to compare the clinical efficacy of patients with stress urinary incontinence and mixed urinary incontinence using minimal invasive Er:YAG vaginal laser. Materials and methods: A total of 20 patients were included, in which were 10 patients with SUI and 10 patients with MUI (stress and urge incontinence), and underwent a 2940 nm Er:YAG laser with a special SMOOTH mode in an outpatient office without anesthesia or postoperative medications. All patients completed two sessions of treatment with an interval time of 28 days. At three months after treatment, all patients were asked to a clinical visit for evaluate the clinical outcome by pre-treatment and post-treatment ICIQ-SF questionnaire. At pretreatment and 3 months after the completion of two therapy sessions, patients were asked to answer the ICIQ-SF questionnaire. The questionnaire consists of three scales for assessment of the treatment outcome of urinary incontinence as: no change (no change score), improvement (decrease score 1–5), and strong improvement (decrease score >5) for two groups of patients with SUI and MUI. All the results were compared by Student's t test with two way analysis of variance between the two groups. Results: A total of 20 patients presented with SUI symptom relief and improvement with treatment satisfaction. All 10 patients with SUI reported improvement after vaginal laser treatment, 70% with marked improvement and 30% with improvement. All 10 patients with MUI also had improvement, 40% with marked improvement and 60% with improvement. There was no statistically significant difference in the treatment outcome between the two groups. Conclusions: Vaginal Erbium laser produce provides vaginal collagen remodeling and synthesis that may repair and restore the pelvic floor function. Despite of sample limitation and short follow up, this treating procedure presented a good and a safe clinical outcome in patients with SUI and with MUI by assessment of ICIQ-SF questionnaire. Keywords: Stress urinary incontinence, Urge incontinence, Mixed urinary incontinence, Er:YAG vaginal laser

We reported a newly fabricated saturable absorber (SA) namely Lutetium oxide (Lu2O3) thin film for generating a stable and compact mode-locked Erbium-doped fibre laser (EDFL) operating at 1564 nm. The film SA was synthesized by embedding Lu2O3 into polyvinyl alcohol (PVA) host film. By incorporating the film SA along with 200 m long single mode fibre (SMF) into an EDFL cavity, the mode-locked laser with 0.97 MHz repetition rate stably emerged at an increasing pump power, ranging within 145-187mW. The pulse width was measured to be 2.12 ps. The highest pulse energy and peak power were measured as 7.64 nJ and 3.61 kW respectively and were obtained at 187 mW pump power. The fundamental frequency was examined to have a signal to noise ratio (SNR) of 61 dB. These laser performances suggest that the Lu2O3 film SA is feasible for becoming an alternative passive SA in the 1. 55 μ m region.

Lately, interesting features of lighting Rare Earths doped phosphorus have gained much attention and became favorite research matter among various groups of scientists. In this context, polycrystalline powders of Na3La(PO4)2: Er (0%, 2,5%) have been prepared by the solid state method. Powder X-ray diffraction, infrared spectroscopy have been used to identify these materials. The spectroscopic properties of Na3La(PO4)2: Er (2,5%) have been investigated through absorption, excitation, emission spectra and decay curves of Er3+ at room temperature. The decay time reveal that Na3La(PO4)2: Er (2,5%) possesses a radiative transition and the lifetime value for the transition 4F9/2 → 4I15/2 is found equal to 144.92 μs. All obtained results have been presented, compared and discussed with last reported works. The CIE chromaticity coordinates have been highlighted. They reveal that Na3La(PO4)2: Er (2,5%, 10%, 20% and 50%) phosphor can be a promising green and yellow-orange luminophore for application in LED.

The strategy of ion doping in metal oxide is generally used to enhance the photoanode film feature, attain a suitable energy band and enhance carrier mobility. Here, a rare earth element erbium was doped into TiO2 electron transport layer (ETL) by adding erbium trinitrate into the titanium precursor solution. In the present investigation, an attempt has been made to fabricate perovskite sensitized erbium doped TiO2 nanoparticle (Er3+@TNPs) photoanode solar cell with different hole transport materials (HTMs) and graphite coated counter electrode. The perovskite sensitized solar cell (PSSC) built with CH3NH3SnI3 sensitized Er3+@TNPs photoanode and spiro-MeOTAD HTM shows an impressive photovoltaic performance had the power conversion efficiency (PCE) of 11.54% when compared to the undoped TiO2 photoanode PSSC. The results of this investigation indicate that the rare earth ion doping could be a promising method for producing effective ETL and enhanced performance PSSCs.

Eu3+-doped erbium, thulium, ytterbium and lutetium aluminium garnets have been synthesized by environmentally friendly aqueous sol-gel method. The results of X-ray diffraction (XRD) analysis of the powders sintered at 1000 °C showed the high purity of the end products with formation of monophasic compounds. The phase composition of the samples was also investigated by FTIR spectroscopy. The microstructural features of the polycrystalline samples were studied by transmission electron microscopy (TEM). The local environments of Eu3+ activator ions in the garnet crystal structure compounds were investigated by nuclear magnetic resonance (NMR) spectroscopy. The luminescence properties were investigated by photoluminescence (PL) study. Effective concentration of Eu3+ ion in these garnets was estimated. The correlation between structural features and luminescence properties was determined.

In this study, the obsidian (Ob) that is a natural glass were doped with and Cerium oxide (CeO2) and Erbium Oxide (Er2O3) in different amount (0.5%, 1%, 3%, and 5%). Obsidian was grinded and glass powder was doped with CeO2 and Er2O3 via mechanical alloying. The doped glass samples were prepared with melting-quenching method. Radiation shielding properties of obsidian doped with CeO2 and Er2O3 were determined at 22.16–59.54 keV photon energies by using an HPGe detector with a resolution of 182 eV at 5.9 keV. It was observed that the radiation absorption tended to increase with the increasing doping amount to obsidian samples. The mass attenuation coefficients both of CeO2 and Er2O3 doped obsidian glass decrease with increasing photon energy. The Er2O3 doped obsidian glasses are better the radiation shielding material than CeO2 doped obsidian glasses.

We propose a few-mode erbium-ring-doped fiber laser with high slope efficiency towards an individual transverse vector mode output. Based on the rate equation, specific transverse vector mode output is achieved through numerical investigations of the position and the thickness of the transverse erbium-doped region. Our results show that a thinner erbium-doped region is favorable for increasing the number of available output transverse vector mode, and the position selects desired transverse vector mode to excite. Moreover, high-order vector modes up to the third-order can be excited with appropriate erbium-doped locations. The laser output using the proposed method has merit of high slope efficiency and high mode purity. The slope efficiency and the mode purity can reach 61.25% and 99.99%, respectively. Our work may find potential applications in high-power lasers and high-order transverse mode operation of fiber lasers.

Made available in DSpace on 2019-10-06T15:41:27Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-07-25 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Optical waveguide amplifiers have seen a growing interest in the last years due to their applications in telecommunication. This paper reports a notable increase of the relative gain of Yb3+/Er3+ codoped Bi2O3–GeO2 waveguides by introducing disorder in the form of silicon nanostructure as scattering centers. A photoluminescence enhancement of about 10 times for the 520 nm and 1530 nm emission bands is observed in the waveguides when the silicon nanostructures are introduced. Increase of the Yb3+/Er3+ effective absorption, due to the scattering provided by the silicon nanostructures, and decrease of [Bi+], caused by the introduction of silicon, are proposed as likely causes for the luminescence and gain enhancement. The pedestal waveguides were fabricated by RF-sputtering followed by optical lithography and reactive ion etching. RF-sputtering of silicon together with Yb/Er and Bi2O3–GeO2 glass, followed by heat treatment, produced Yb3+/Er3+ codoped Bi2O3–GeO2 waveguides with silicon nanostructures of size 25–30 nm. The resulting relative gain reached 5.5 dB/cm at 1542 nm representing an enhancement of 50% with respect to waveguides without silicon nanostructures. This strategy of introducing appropriate disorder may open an avenue for designing and manufacture of novel photonic devices in this emerging field of integrated optics. Centro de Lasers e Aplicações Instituto de Pesquisas Energéticas e Nucleares CNEN-IPEN/SP, Av. Prof. Lineu Prestes 2242 Escola Politécnica Universidade de São Paulo Faculdade de Tecnologia de São Paulo CEETEPS/UNESP Faculdade de Tecnologia de São Paulo CEETEPS/UNESP FAPESP: 2013/26113-6 CNPq: 465.763/2014 FAPESP: PV-2017/05854-9

For the first time, to the best of our knowledge, a comprehensive study has been carried out to investigate the effects of ion beam on erbium thin films. Thin enriched erbium films with areal density ∼50–200 μg/cm2 sandwiched between carbon films were prepared using the high vacuum deposition technique. The samples were bombarded with fluorine ion beam accelerated to 90 MeV energy using a tandem accelerator. Irradiation time was varied for each sample. Accelerator based characterization technique-Rutherford Backscattered Spectrometry (RBS) was used to study the structural changes induced by ion beam irradiation. The morphology and composition of the samples were studied using Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive x-ray Spectroscopy (EDS), respectively. Comparisons have been drawn between the various samples and with pristine erbium sample. These results show that erbium films are quite stable under energetic ion beam irradiation. This makes their application in various fields dealing with high radiation protection and shielding possible.

Erbium doped tin-oxide thin film transistors (ErSnO-TFTs) were fabricated by Radio-Frequency magnetron sputtering (RFMS) using SnO target and Er foil. Effects of Er concentration on crystallinity, optical band-gap, surface chemical information, defect states, surface morphology, along with the electrical properties of ErSnO-TFTs, were investigated. The results indicate that moderate Er concentration is beneficial to the performance of ErSnO-TFTs. The relatively good device performance was obtained at the Er concentration of 3.1 at.% within our experimental conditions. The optimum field-effect mobility (μFE), subthreshold swing (SS), threshold voltage (Vth), on-off current ratio (Ion/off) and the total interfacial trap states (Nt) are 3.9 cm2/V, 0.49 Vdec−1, -0.4 V, 2.9 × 107 and 5.1 × 1011 cm−2. This work may pave the way for the development of lanthanides doped Sn-based thin film devices.

Rare Earth doped-phosphate glasses have received a great deal of attention on research because of their applications in biomaterial engineering, however, little to no attention has been given to potential luminescent properties from “heating” these materials when exposed to ionizing radiation. This paper aims to presents results on investigations of Thermoluminescent (TL) and Optically Stimulated Luminescence (OSL) properties of the Er3+-doped phosphate glasses produced at the Physics Department of Federal University of Juiz de Fora on a characterization for beta radiation dosimetry. It was used a RISO TL/OSL reader and its coupled 90Sr/90Y beta source. The experimental findings indicate that the material presents linear responses of thermo (TL) and optically stimulated luminescence (OSL) over the absorbed dose range of 2 to 20Gy. Its emitted TL and OSL signal is more intense and with extended linearity range compared with undoped phosphate glass, probably caused by two absorption bands on 350–380 nm from Er3+. Further investigations are being carried out on its applications to other types and qualities of radiation.

In this investigation, to reach a widely wavelength-selectable and stable single-longitudinal-mode (SLM) erbium-doped fiber (EDF) ring laser, the unpumped EDF-based saturable absorber (SA) and dual-ring structure are used simultaneously for thickly multi-longitudinal-mode (MLM) suppression. The dual-ring scheme can spread the operation range of gain medium from 1520.0 to 1580.0 nm only by using a C-band erbium-doped fiber amplifier (EDFA). Moreover, the dual-ring scheme and EDF-based SA also could suppress the MLM noise for SLM oscillation. In the tuning range, the Lorentzian 3 dB linewidth is also obtained between 15 and 22 kHz in the wavelength range.

Erbium-to-dysprosium energy-transfer and visible luminescence in the blue, green, yellow, red, and NIR is reported in PbGeO3:PbF2:CdF2 glass under 405 nm excitation. Absorption and excitation spectra were examined in the UV–VIS-IR spectral region. Emission showed a decrease in the Er3+ emissions around 520 and 545 nm when Dy3+ was added to the host matrix, while the Dy3+ emission around 576 nm (4F9/2 – 6H13/2) increased concomitantly. The recorded lifetime for Er3+ emissions also decreased, as Dy3+ concentration was increased for fixed Er3+ content. No similar behavior was observed when Er3+ concentration varied, confirming a one-way Er3+-to-Dy3+ energy transfer mechanism.

Family of lithium zinc fluoroborate glasses with 15ZnF2-10BaO-8Al2O3–12Li2O-(55-x) B2O3-xEr2O3 (x = 0.5, 0.7, 1.1, 1.3 and 1.5 mol%) composition were prepared by conventional melt-quench method. The glasses were characterized to study their structural, physical, optical and radiative properties. The amorphous characteristic of glass was noticed in X-Ray Diffraction pattern. A modification in structure was observed as density values increased with Er2O3 content. UV–Vis–NIR transitions of Er3+ in the host matrix were identified through absorption spectra. Covalent nature of bonding between Er3+ ions and their surrounding ligands was observed through bonding parameter and Judd-Ofelt parameters. Red shift of the fundamental absorption edge in the absorption spectra and decreasing indirect and direct band gaps with increasing Er3+ concentration jointly confirmed the role of Er3+ ions as network modifier. Hypersensitive transitions of Er3+ ion namely 4I15/2 → 2H11/2 & 4I15/2 → 4G11/2 were interpreted through their higher oscillator strengths when compared to other transitions. Emission spectra recorded at 980 nm excitation showed a peak corresponding to 4I13/2 → 4I15/2 NIR transition of erbium ion. Stimulated emission cross section of Er0.5 sample, gain bandwidth and Figure of Merit were found to be 16.79 × 10−21 cm2, 1225.83 × 10−28 cm3 and 37.36 × 10−24 cm2 s respectively. Photoluminescence decay curve of Er0.5 sample was well-fitted to single exponential first order function. The experimental decay lifetime τexp for the 4I13/2 level was measured to be 0.34 ms. The wide frequency range of FWHM (1.02–1.67 × 1013 Hz) and high values of radiative parameters make the glass a suitable candidate as optical amplifier and NIR laser material.

Li2BaP2O7 activated with Er3+ ions was prepared by the classic ceramic method and characterized by X-ray diffraction technique, IR, Raman and photoluminescence (PL) spectroscopies. The Li2BaP2O7: Er phosphors exhibited a monoclinic single phase structure with C2/c space group. A green and red emission lines dominate the spectrum upon excitation at 400 nm. The CIE-coordinate (x = 0.308, y = 0.512) were found in green light. Free ion parameters of the Er3+ ions in Li2BaP2O7 and the Judd–Ofelt parameters were calculated and they were used to explore the radiative parameters such as transition probability (AT), and branching ratios (β) related to the Er3+ emission transitions. The calculated 4S3/2 radiative life time around 0.198 ms is compared with the experimental value. The calculated quantum efficiency is about 42%. Li2BaP2O7: Er can be considered as a novel green phosphor.