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Temperature dependence and quantum efficiency of ultrabroad NIR photoluminescence from Ni2+ centers in nanocrystalline Ba-Al titanate glass ceramics.
- Source :
-
Optics letters [Opt Lett] 2012 Apr 01; Vol. 37 (7), pp. 1166-8. - Publication Year :
- 2012
-
Abstract
- Ultrabroad near-infrared (NIR) photoluminescence from Ni2+-centers in nanocrystalline Ba-Al titanate glass ceramics was studied by temperature-dependent static and dynamic photoluminescence spectroscopy in the regime of 10 to 300 K. Photoluminescence covers the spectral range of about 1100 nm to >1600 nm with a typical bandwidth (FWHM) greater than 300 nm. For UV-LED excitation at 352 nm, an internal quantum efficiency of 65% is obtained. The excited state lifetime τ at room temperature is 39 μs. The stimulated emission cross section σ(em) is 8.5×10(-20) cm2, resulting in a practical figure of merit, σ(em) * τ, of 3.3×10(-24) cm2 s at room temperature. These properties suggest suitability as a broadband gain medium for tunable lasers and optical amplifiers.
Details
- Language :
- English
- ISSN :
- 1539-4794
- Volume :
- 37
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Optics letters
- Publication Type :
- Academic Journal
- Accession number :
- 22466183
- Full Text :
- https://doi.org/10.1364/OL.37.001166