光阑对激光限幅器限幅效率影响的数值仿真  

Numerical Simulation of the Amplitude-limiting Efficiency for Various Sizes of the Diaphragm

作　　者：牛燕雄[1] 汪岳峰[1] 陈德伟 张雏[1] 

机构地区：[1]军械工程学院光学与电子工程系,石家庄050003 [2]广州军区军械雷达修理所武器站,广州510000

出　　处：《光电子．激光》2002年第4期359-361,共3页Journal of Optoelectronics·Laser

摘　　要：当激光功率超过自聚焦阈值功率时 ,激光光束在非线性介质中将发生自聚焦现象 ,光束的强度分布发生改变 ,本文基于激光在非线性介质自聚焦现象 ,设计了强激光功率限制装置 ,对光阑大小对限幅效应的影响进行了数值仿真研究。结果表明 ,一般光阑的直径不能超过入射光束的When the laser power is higher than the threshold power of the self focusing,the laser beam will self focusing in the non linear medium and the distribution of the beam intensity will change.In the paper,based on the phenomenon of self focusing in the non linear medium,we design an equipment to limit the power of the strong laser.As the size of the diaphragm will affect the amplitude limiting effect,we simulate and research it.The result shows that the size of the diaphragm cant usually beyond the five times of the size of the beam.

关 键 词：光阑 激光限幅器 限幅效率 数值仿真 

分 类 号：TN24[电子电信—物理电子学]