1. Efficient Pumping Scheme by Direct Excitation of Upper Laser Level in Nd:CNGG
- Author
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Cao Ning, Zhao Yan-Ying, Wang Ji-Yang, XU Chang-Wen, Wei Zhi-Yi, Zhang Zhi-Guo, Feng Bao-Hua, Zhang Huai-Jin, Gao Chun-Qing, LI Qi-Nan, and HE Kun-Na
- Subjects
Materials science ,business.industry ,Slope efficiency ,General Physics and Astronomy ,Laser ,law.invention ,Optical pumping ,Wavelength ,Optics ,law ,Nd:YAG laser ,Sapphire ,Optoelectronics ,business ,Lasing threshold ,Excitation - Abstract
We report an efficient pumping scheme which involves a direct excitation of the upper lasing level of a four-level laser in a Nd-doped Ca3(NbGa)2-xGa3O12 (Nd:CNGG) by using a tunable Tr.sapphire, 700–920 nm, cw pump source. The slope efficiency is improved from 10.5% of the traditional band pumping at 808nm to 21.8% of the direct pumping at 882 nm. The influence of pumping wavelength on lasing is discussed. We present a scheme of double pumping for lasing.
- Published
- 2008