Measurement of stimulated Brillouin scattering （SBS） threshold based on waveform variation of SBS optical limiting

• Published in: Chinese physics B no. 12; pp. 5362 - 5365
• Main Author: 哈斯乌力吉 鲁欢欢 付美玲 公胜 吕志伟 林殿阳 何伟明 高玮
• Format: Journal Article
• Language: English
• Published: 2009
• Subjects: SBS; 光限幅; 受激布里渊散射; 散射测量; 波形变化; 钕：YAG激光器
• ISSN: 1674-1056; 2058-3834

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.