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Efficient Pumping Scheme by Direct Excitation of Upper Laser Level in Nd:CNGG |
| CAO Ning1, LI Qi-Nan1, ZHAO Yan-Ying1, XU Chang-Wen1, WEI Zhi-Yi1, FENG Bao-Hua1, ZHANG Zhi-Guo1, ZHANG Huai-Jin2, WANG Ji-Yang2, HE Kun-Na3, GAO Chun-Qing3 |
| 1Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 1001902State Key Laboratory of Crystal Material and Institute of Crystal Material, Shandong University, Jinan 2501003School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081 |
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| Cite this article: |
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CAO Ning, LI Qi-Nan, ZHAO Yan-Ying et al 2008 Chin. Phys. Lett. 25 4016-4018 |
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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 Ti:sapphire, 700-920nm, 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 882nm. The influence of pumping wavelength on lasing is discussed. We present a scheme of double pumping for lasing.
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42.70.Hj
42.55.Xi
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Received: 06 July 2008
Published: 25 October 2008
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