多光束激光远场干涉实验研究  

Experimental Study of Multi-Beam Laser Far-Field Interference

作　　者：张曦霞[1] 王会升[2] 朱孟真[2] 杨雪[2] 米朝伟[2] 韦尚方[2] 

机构地区：[1]武汉军械士官学校理化教研室,湖北武汉430075 [2]武汉军械士官学校光电技术研究所,湖北武汉430075

出　　处：《光学与光电技术》2011年第1期5-8,共4页Optics & Optoelectronic Technology

基　　金：国防预研项目(51302010206)资助项目

摘　　要：设计了多组多孔径光阑,将激光扩束后通过自制的多孔径光阑,获得多光束相干激光光源。基于多光束干涉理论,通过改变不同的光阑,得到多组点状阵列分布的远场干涉图样,结果表明远场中心主瓣具有随着占空比减小能量降低、旁瓣增多的分布规律。实验结果表明,相干源呈正三角形分布时能量集中度较好。对高功率激光相干合成具有一定的参考意义。A batch of muti-aperture diaphragm are designed. Laser beam passes through muti-aperture diaphragm after expanded, and then, multi-beam coherent lasers are attained. Based on multi-beam laser interference theory, by changing mutiaperture diaphragm, the coherent combining intensity distribution of multi-beam laser is observed. The results show that the decrease of duty ratio of output elements will reduce the enegy of the central lobe, and increase the number of side lobes. It is found that the far-field interference intensity distribution is best when coherent elements is on triangle array. The experiment results provide the references for high power laser coherent combining.

关 键 词：激光 多光束 阵列 相干合成 

分 类 号：TN247[电子电信—物理电子学]