Improved output energy characteristic of optical limiting based on double stimulated Brillouin scattering
Improved output energy characteristic of optical limiting based on double stimulated Brillouin scattering
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DOI：
10.1007/s00340-009-3485-0
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
W. Hasi;Z. W. Lu;M. Fu;H. Lu;S. Gong;D. Lin;W. He
中科院分区：
文献类型：
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作者：
W. Hasi;Z. W. Lu;M. Fu;H. Lu;S. Gong;D. Lin;W. He
为了提高基于受激布里渊散射（SBS）的光限幅性能，提出了一种基于双SBS的方法。数值模拟了基于双SBS的光限幅输出能量与泵浦能量的关系，并用Nd：YAG种子注入激光器进行了实验验证。结果表明，在低泵浦能量下，只有第一级SBS光限幅起作用。然而，随着泵浦能量的增加，如果第一SBS的传输功率仍然高于SBS阈值，则可以激活第二SBS过程。因此，基于双SBS的光限幅的输出能量特性要比基于单SBS的光限幅的输出能量特性好得多。由于SBS光限幅具有纳秒级的响应时间和较高的阈值功率，在高功率激光系统中可以起到保护作用。
In order to improve the optical limiting performance based on stimulated Brillouin scattering (SBS), a method based on double SBS is proposed in this paper. The dependence of the output energy of optical limiting based on double SBS on the pump energy is numerically simulated, and experimentally validated with an Nd:YAG seed-injected laser. The results indicate that only the first SBS optical limiting works in the case of low pump energy. However, as the pump energy increases, the second SBS process can be activated if the transmitted power of the first SBS is still above the SBS threshold. Therefore, the output energy characteristic of optical limiting based on double SBS is much better than that based on single SBS. Owing to the sub-nanosecond response time and a high power threshold, the SBS optical limiting can provide protection in high power laser systems.