采用扩展的Nijboer-Zernike方法的激光光束特征值检测  

Acquisition of Laser Beam Characteristics by Extended Nijboer-Zernike Method

作　　者：刘敏时[1] 王晓曼[1] 王斌[2] 姜宇鹏[2] 

机构地区：[1]长春理工大学电子信息工程学院,吉林长春130022 [2]中国科学院长春光学精密机械与物理研究所,吉林长春130022

出　　处：《光学学报》2014年第10期154-161,共8页Acta Optica Sinica

基　　金：吉林省工业高新技术项目(20115079)

摘　　要：采用扩展的Nijboer-Zernike(NZ)方法的逆运算,由焦平面区域的两幅强度图像,获得激光光束出瞳面的振幅信息和相位信息,进而给出激光光束质量因子M2、束宽、束散角、瑞利长度。构建了满足精度要求的实验系统,对一个He-Ne激光器在两天内进行两次测试。将得到的波前相位与相位差异法得到的波前相位进行比较,证明激光波前相位测试结果合理;将得到的特征值数据与M2-200s-FW型激光光束分析仪得到的数据进行比较,证明激光光束特征值测试结果合理。对比两天测试结果,说明该测试系统是稳定可靠的。The inverse operation of the extended Nijboer-Zernike （NZ） method is applied to acquire the laser beam characteristics. Two images at the locations before and behind the focal plane are used to calculate the amplitude and phase of wavefront at pupil plane of laser beam. The laser beam quality factor M2 , the beam width, the divergence, and the Rayleigh range are obtained. The experimental system is established which meets the accuracy requirement. Two actual tests of a He-Ne laser are carried out in different days. The test result of wavefront is compared with that of the phase diversity method and the test results of beam characteristics are compared with that of M2-200s-FW beam analyzer, which shows that the proposed method is reasonable. The stability and reliability of the established system is verified by comparison of the tests in different days.

关 键 词：激光光学 激光光束特征值 相位恢复 激光传输 

分 类 号：O348.11[理学—固体力学]