Abstract
Ultrabroad near-infrared (NIR) photoluminescence from -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 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 at room temperature is 39 μs. The stimulated emission cross section is , resulting in a practical figure of merit, , of at room temperature. These properties suggest suitability as a broadband gain medium for tunable lasers and optical amplifiers.
©2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Changgui Lin, Chao Liu, Zhiyong Zhao, Legang Li, Christian Bocker, and Christian Rüssel
Opt. Lett. 40(22) 5263-5266 (2015)
Shiqing Xu, Degang Deng, Renqiang Bao, Haidong Ju, Shilong Zhao, Huanping Wang, and Baolin Wang
J. Opt. Soc. Am. B 25(9) 1548-1552 (2008)
Guojun Gao, Ning Da, Sindy Reibstein, and Lothar Wondraczek
Opt. Express 18(S4) A575-A583 (2010)