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Start Over Author "Zhao, Yongguang" Journal optics express
38 results on '"Zhao, Yongguang"'

2. Sub-60-fs mode-locked Tm,Ho:CaYLuAlO4 laser at 2.05 µm

Author

Liu, Shande, primary, Wang, Peifu, additional, Li, Kuan, additional, Lv, Jiawen, additional, Jin, Yicheng, additional, Xu, Xiaodong, additional, Wang, Zhanxin, additional, Liu, Jian, additional, Liu, Junting, additional, and Zhao, Yongguang, additional

Published
2024
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5. Semiconductor saturable absorber mirror mode-locked Yb:YAP laser

Author

Lin, Zhang-Lang, primary, Xue, Wen-Ze, additional, Zeng, Huang-Jun, additional, Zhang, Ge, additional, Zhao, Yongguang, additional, Xu, Xiaodong, additional, Xu, Jun, additional, Loiko, Pavel, additional, Mateos, Xavier, additional, Lin, Haifeng, additional, Petrov, Valentin, additional, Wang, Li, additional, and Chen, Weidong, additional

Published
2022
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6. SESAM mode-locked Tm:Y2O3 ceramic laser

Author

Zhang, Ning, primary, Liu, Shande, additional, Wang, Zhanxin, additional, Liu, Jian, additional, Xu, Xiaodong, additional, Xu, Jun, additional, Wang, Jun, additional, Liu, Peng, additional, Ma, Jie, additional, Shen, Deyuan, additional, Tang, Dingyuan, additional, Lin, Hui, additional, Zhang, Jian, additional, Chen, Weidong, additional, Zhao, Yongguang, additional, Griebner, Uwe, additional, and Petrov, Valentin, additional

Published
2022
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9. SESAM mode-locked Yb:Sr3Y2(BO3)4 laser

Author

Sun, Shijia, primary, Zeng, Huang-Jun, additional, Lin, Zhang-Lang, additional, Xue, Wen-Ze, additional, Zhang, Ge, additional, Lin, Zhoubin, additional, Petrov, Valentin, additional, Lin, Haifeng, additional, Loiko, Pavel, additional, Mateos, Xavier, additional, Zhao, Yongguang, additional, Teng, Bing, additional, Wang, Li, additional, and Chen, Weidong, additional

Published
2022
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10. Diode-pumped SESAM mode-locked Yb:(Y,Gd)AlO3 laser

Author

Xue, Wen-Ze, primary, Lin, Zhang-Lang, additional, Zeng, Huang-Jun, additional, Zhang, Ge, additional, Zhang, Peixiong, additional, Chen, Zhenqiang, additional, Li, Zhen, additional, Petrov, Valentin, additional, Loiko, Pavel, additional, Mateos, Xavier, additional, Lin, Haifeng, additional, Zhao, Yongguang, additional, Wang, Li, additional, and Chen, Weidong, additional

Published
2022
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11. Soliton mode-locked Yb:Ca3Gd2(BO3)4 laser

Author

Zeng, Huang-Jun, primary, Lin, Zhang-Lang, additional, Xue, Wen-Ze, additional, Zhang, Ge, additional, Chen, Yujin, additional, Pan, Zhongben, additional, Petrov, Valentin, additional, Loiko, Pavel, additional, Mateos, Xavier, additional, Zhao, Yongguang, additional, Lin, Haifeng, additional, Wang, Li, additional, and Chen, Weidong, additional

Published
2022
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12. Polarized spectroscopy and SESAM mode-locking of Tm,Ho:CALGO

Author

Wang, Yicheng, primary, Loiko, Pavel, additional, Zhao, Yongguang, additional, Pan, Zhongben, additional, Chen, Weidong, additional, Mero, Mark, additional, Xu, Xiaodong, additional, Xu, Jun, additional, Mateos, Xavier, additional, Major, Arkady, additional, Guina, Mircea, additional, Petrov, Valentin, additional, and Griebner, Uwe, additional

Published
2022
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13. Ho:LuAG single crystal fiber: growth, spectroscopy and laser characteristics

Author

Liu, Jian, primary, Song, Qingsong, additional, Wang, Zhanxin, additional, Wang, Yinyin, additional, Dong, Jifei, additional, Xu, Jie, additional, Liu, Peng, additional, Li, Dongzhen, additional, Wang, Jianlei, additional, Wang, Chun, additional, Lebbou, Kheirreddine, additional, Xue, Yanyan, additional, Xu, Jun, additional, Xu, Xiaodong, additional, and Zhao, Yongguang, additional

Published
2022
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14. Direct generation of mid-infrared pulsed optical vortices at ∼ 2.7 µm

Author

Gao, Qinggang, primary, Zhou, Jingjing, additional, Jia, Daiwen, additional, Wang, Yinyin, additional, Chen, Bin, additional, Liu, Peng, additional, Huang, Zixuan, additional, Tian, Kangzhen, additional, Liu, Shande, additional, Zhang, Yuping, additional, Zhang, Huiyun, additional, Wang, Zhanxin, additional, and Zhao, Yongguang, additional

Published
2021
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15. SWCNT-SA mode-locked Tm,Ho:LCLNGG laser

Author

Pan, Zhongben, primary, Wang, Li, additional, Bae, Ji Eun, additional, Rotermund, Fabian, additional, Wang, Yicheng, additional, Zhao, Yongguang, additional, Loiko, Pavel, additional, Mateos, Xavier, additional, Griebner, Uwe, additional, Petrov, Valentin, additional, and Chen, Weidong, additional

Published
2021
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16. Ultrafast laser inscribed waveguide lasers in Tm:CALGO with depressed-index cladding

Author

Llamas, Victor, primary, Loiko, Pavel, additional, Kifle, Esrom, additional, Romero, Carolina, additional, Vázquez de Aldana, Javier R., additional, Pan, Zhongben, additional, Serres, Josep Maria, additional, Yuan, Hualei, additional, Dai, Xiaojun, additional, Cai, Huaqiang, additional, Wang, Yicheng, additional, Zhao, Yongguang, additional, Zakharov, Viktor, additional, Veniaminov, Andrey, additional, Thouroude, Romain, additional, Laroche, Mathieu, additional, Gilles, Hervé, additional, Aguiló, Magdalena, additional, Díaz, Francesc, additional, Griebner, Uwe, additional, Petrov, Valentin, additional, Camy, Patrice, additional, and Mateos, Xavier, additional

Published
2020
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17. “Mixed” Tm:Ca(Gd,Lu)AlO4 — a novel crystal for tunable and mode-locked 2 µm lasers

Author

Pan, Zhongben, primary, Loiko, Pavel, additional, Serres, Josep Maria, additional, Kifle, Esrom, additional, Yuan, Hualei, additional, Dai, Xiaojun, additional, Cai, Huaqiang, additional, Wang, Yicheng, additional, Zhao, Yongguang, additional, Aguiló, Magdalena, additional, Díaz, Francesc, additional, Griebner, Uwe, additional, Petrov, Valentin, additional, and Mateos, Xavier, additional

Published
2019
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18. 67-fs pulse generation from a mode-locked Tm,Ho:CLNGG laser at 2083 nm

Author

Zhao, Yongguang, primary, Wang, Yicheng, additional, Chen, Weidong, additional, Pan, Zhongben, additional, Wang, Li, additional, Dai, Xiaojun, additional, Yuan, Hualei, additional, Zhang, Yan, additional, Cai, Huaqiang, additional, Bae, Ji Eun, additional, Choi, Sun Young, additional, Rotermund, Fabian, additional, Loiko, Pavel, additional, Serres, Josep Maria, additional, Mateos, Xavier, additional, Zhou, Wei, additional, Shen, Deyuan, additional, Griebner, Uwe, additional, and Petrov, Valentin, additional

Published
2019
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30. Femtosecond pulse generation from a SESAM mode-locked Tm,Ho:SrF 2 laser at 2.08 µm.

Author

Zhang N, Zhang Z, Wang Y, Ding H, Zhao Y, Xue Y, Su L, and Xu J

Abstract

We report on a passively mode-locked Tm,Ho:SrF 2 laser employing a SESAM as saturable absorber (SA), delivering nearly Fourier-transform-limited 246 fs pulses at 2084nm without any additional intra- or extra-cavity dispersion compensation elements. This represents, to the best of our knowledge, the shortest pulses generated from the mode-locked fluoride bulk lasers in the 2-µm spectral range. Such compact femtosecond laser can be a potential seed source for large-sized fluoride bulk amplifier systems with exact gain match, enabling the generation of ultrashort intense pulses around 2 µm.

Published
2024
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31. Sub-60-fs mode-locked Tm,Ho:CaYLuAlO 4 laser at 2.05 µm.

Author

Liu S, Wang P, Li K, Lv J, Jin Y, Xu X, Wang Z, Liu J, Liu J, and Zhao Y

Abstract

Tm,Ho:CaYLuAlO 4 (Tm,Ho:CALYLO) crystal has wide emission spectra both for π-polarization and σ-polarization, showing significant potential for the generation of ultrashort pulses. Here, a widely tunable and passively mode-locked laser operation based on Tm,Ho:CALYLO crystal under two polarizations was demonstrated for what we believe to be the first time ever. For π-polarization, a maximum output power of 1.52 W and a tuning range of 255.3 nm were achieved in the continuous wave (CW) regime. In the mode-locked regime, a pulse duration of 68 fs and an average output power of 228 mW were achieved upon GaSb-based semiconductor saturable absorber mirror (SESAM). As for σ-polarization, a broader tuning range of 267.1 nm was realized, leading to the shorter pulse duration of 58 fs at 79.7 MHz repetition rate.

Published
2024
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32. Reduction of thermal effects in a 2.7-µm Er:Y 2 O 3 ceramic laser with annular pumping.

Author

Chen B, Du T, Wang J, Gao Q, Zhang N, Zheng C, Dong J, Zhou J, Zhang H, Zhang Y, and Zhao Y

Abstract

Reduction of thermal effects is a challenging aspect for power scaling of 2.7-µm bulk Er-lasers due to the large quantum defect when pumping at ∼ 0.97 µm. Here, we demonstrate that thermal effects in an Er:Y 2 O 3 ceramic laser can be significantly reduced pumping by an annular beam, thus improving the continuous-wave (CW) laser performance in the 3-µm spectral range. The excitation conditions of the TEM 00 mode were determined theoretically by taking into account the propagation characteristics of the annular pump beam. For a comparison, the temperature and stress distributions are at first theoretically studied with three different pump configurations. In the experiment, output power of the Er:Y 2 O 3 ceramic laser improved by ∼ 60% by changing the pump beam from coventional quasi-top-hat to a designed annular one. This work, as a proof-of-principle study, indicates the potential of power scaling of the 2.7-µm bulk Er-lasers pumping with an annular beam.

Published
2023
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33. SESAM mode-locked Tm:Y 2 O 3 ceramic laser.

Author

Zhang N, Liu S, Wang Z, Liu J, Xu X, Xu J, Wang J, Liu P, Ma J, Shen D, Tang D, Lin H, Zhang J, Chen W, Zhao Y, Griebner U, and Petrov V

Abstract

We demonstrate a widely tunable and passively mode-locked Tm:Y 2 O 3 ceramic laser in-band pumped by a 1627-nm Raman fiber laser. A tuning range of 318 nm, from 1833 to 2151 nm, is obtained in the continuous-wave regime. The SESAM mode-locked laser produces Fourier-transform-limited pulses as short as 75 fs at ∼ 2.06 µm with an average output power of 0.26 W at 86.3 MHz. For longer pulse durations of 178 fs, an average power of 0.59 W is achieved with a laser efficiency of 29%. This is, to the best of our knowledge, the first mode-locked Tm:Y 2 O 3 laser in the femtosecond regime. The spectroscopic properties and laser performance confirm that Tm:Y 2 O 3 transparent ceramics are a promising gain material for ultrafast lasers at 2 µm.

Published
2022
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34. Diode-pumped SESAM mode-locked Yb:(Y,Gd)AlO 3 laser.

Author

Xue WZ, Lin ZL, Zeng HJ, Zhang G, Zhang P, Chen Z, Li Z, Petrov V, Loiko P, Mateos X, Lin H, Zhao Y, Wang L, and Chen W

Abstract

We report on the continuous-wave (CW) and mode-locked (ML) laser performance of an Yb 3+ -doped yttrium-gadolinium orthoaluminate crystal, Yb:(Y,Gd)AlO 3 . Pumping by a single-transverse-mode fiber-coupled 976 nm InGaAs laser diode, the maximum output power in the CW regime amounted to 429 mW at 1041.8 nm corresponding to a slope efficiency of 51.1% and a continuous wavelength tuning across 84 nm (1011-1095 nm) was achieved. The self-starting ML operation of the Yb:(Y,Gd)AlO 3 laser was stabilized by a semiconductor saturable absorber mirror. Soliton pulses as short as 43 fs were generated at 1052.3 nm with an average output power of 103 mW and a pulse repetition rate of ∼70.8 MHz. To the best of our knowledge, our result represents the first report on the passively mode-locked operation of a Yb:(Y,Gd)AlO 3 laser, and the shortest pulse duration ever achieved from any Yb 3+ -doped orthorhombic perovskite aluminate crystals.

Published
2022
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35. SESAM mode-locked Yb:Sr 3 Y 2 (BO 3 ) 4 laser.

Author

Sun S, Zeng HJ, Lin ZL, Xue WZ, Zhang G, Lin Z, Petrov V, Lin H, Loiko P, Mateos X, Zhao Y, Teng B, Wang L, and Chen W

Abstract

We demonstrate the first sub-40 fs soliton pulse generation from a diode-pumped Yb:Sr 3 Y 2 (BO 3 ) 4 laser passively mode-locked by a semiconductor saturable absorber mirror. Pulses as short as 38 fs at a central wavelength of 1051.7 nm were achieved with an average output power of 115 mW and a pulse repetition rate of 67.7 MHz. The maximum average output power reached 303 mW at 1057.8 nm with a slightly longer pulse duration of 52 fs, which corresponded to a peak power of 76.9 kW and an optical efficiency of 25.3%.

Published
2022
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36. Soliton mode-locked Yb:Ca 3 Gd 2 (BO 3 ) 4 laser.

Author

Zeng HJ, Lin ZL, Xue WZ, Zhang G, Chen Y, Pan Z, Petrov V, Loiko P, Mateos X, Zhao Y, Lin H, Wang L, and Chen W

Abstract

We report on a soliton mode-locked Yb:Ca 3 Gd 2 (BO 3 ) 4 laser at ∼1.06 µm stabilized by a semiconductor saturable absorber mirror. Pumping with a single-transverse mode, fiber-coupled laser diode at 976 nm, the Yb:Ca 3 Gd 2 (BO 3 ) 4 laser delivers soliton pulses as short as 39 fs at a central wavelength of 1059.2 nm with an average output power of 70 mW and a pulse repetition rate of ∼67.3 MHz.

Published
2022
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37. "Mixed" Tm:Ca(Gd,Lu)AlO 4 - a novel crystal for tunable and mode-locked 2 µm lasers.

Author

Pan Z, Loiko P, Serres JM, Kifle E, Yuan H, Dai X, Cai H, Wang Y, Zhao Y, Aguiló M, Díaz F, Griebner U, Petrov V, and Mateos X

Abstract

We report on the crystal growth, spectroscopy characterization and first laser operation of a new tetragonal disordered "mixed" calcium aluminate crystal, Tm:Ca(Gd,Lu)AlO 4 . The introduction of Lu 3+ leads to an additional inhomogeneous broadening of Tm 3+ absorption and emission spectra compared to the well-known Tm:CaGdAlO 4 . The maximum stimulated-emission cross-section for the 3 F 4 → 3 H 6 Tm 3+ transition is 0.91 × 10 -20 cm 2 at 1813 nm for σ-polarization, and the emission bandwidth is more than 200 nm. A continuous-wave diode-pumped Tm:Ca(Gd,Lu)AlO 4 laser generates 1.82 W at 1945 nm with a slope efficiency of 29%. Under Ti:Sapphire laser pumping, a continuous tuning of the laser wavelength from 1836 to 2083 nm (tuning range: 247 nm) is demonstrated. The Tm:Ca(Gd,Lu)AlO 4 crystal is promising for tunable/femtosecond lasers at ~2 μm.

Published
2019
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38. Sub-10 optical-cycle passively mode-locked Tm:(Lu 2/3 Sc 1/3 ) 2 O 3 ceramic laser at 2 µm.

Author

Wang Y, Jing W, Loiko P, Zhao Y, Huang H, Mateos X, Suomalainen S, Härkönen A, Guina M, Griebner U, and Petrov V

Abstract

A Tm-doped mixed sesquioxide ceramic laser is mode-locked near 2 µm using InGaAsSb quantum-well semiconductor saturable absorber and chirped mirrors for dispersion compensation. Maximum average output power of 175 mW is achieved for a pulse duration of 230 fs at a repetition rate of 78.9 MHz with a 3% output coupler. Applying a 0.2% output coupler pulses as short as 63 fs are generated at 2.057 µm.

Published
2018
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