Measurement of stimulated Brillouin scattering (SBS) threshold based on waveform variation of SBS optical limiting
Hasi Wu-Li-Ji(哈斯乌力吉), Lu Huan-Huan(鲁欢欢), Fu Mei-Ling(付美玲), Gong Sheng(公胜), ü Zhi-Wei(吕志伟)†, Lin Dian-Yang(林殿阳), He Wei-Ming(何伟明), and Gao Wei(高玮)
Institute of Opto-electronics, Harbin Institute of Technology, Harbin 150080, China and National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150080, China
Abstract This paper proposes a method for measuring the stimulated Brillouin scattering (SBS) threshold based on waveform variation of SBS optical limiting. The output waveforms for different pump power densities are numerically simulated, and validated in the Nd:YAG seed-injected laser system. The results indicate that SBS does not take place in the case of a low pump power density and thus the output power scales up linearly with pump power. Once the pump power density exceeds the SBS threshold, SBS takes place and thereby the energies are transferred from pump to Stokes. As a result, a small shoulder appears in the trailing edge of the output waveform, which provides another method to determine the SBS threshold.
Received: 15 February 2009
Revised: 16 March 2009
Accepted manuscript online:
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 60778019 and
60878005), the Program for New Century Excellent Talents in
University (Grant No NCET-08-0173), the Program of Excellent Team in
Harbin Institute of Technology a
Cite this article:
Hasi Wu-Li-Ji(哈斯乌力吉), Lu Huan-Huan(鲁欢欢), Fu Mei-Ling(付美玲), Gong Sheng(公胜), ü Zhi-Wei(吕志伟), Lin Dian-Yang(林殿阳), He Wei-Ming(何伟明), and Gao Wei(高玮) Measurement of stimulated Brillouin scattering (SBS) threshold based on waveform variation of SBS optical limiting 2009 Chin. Phys. B 18 5362
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