【摘要】 根据声光调制中的频率、相位调制原理,文章提出了一种光学相移的方法.利用一对声光调制器,合理校准它们,可以构建出一个光学相移器.这个相移器通过两声光调制器的超声波相位差可以直接控制两光束的相位差.当使用与偏振无关的声光调制器时,该相移器对入射光的偏振并不敏感,而且不需要精确的机械刻度.这是把相移直接引入校准激光束的光学相移方法,且提出的该方法与实验结果完全一致.更多还原

【Abstract】 Based on theory of modulation of the frequency and phase modulated acousto-optic,a optical phase-shifting method is introduced.By using a pair of acousto-optic modulators(AOMs) and properly aligning them,we construct an optical phase shifter that can directly control the phase of a collimated beam.The proposed phase shifter is insensitive to the polarization of the incident beam when polarization-insensitive AOMs are used,and no calibration is necessary.It is the method that can incident phase-shifting directly.The proposed approach is confirmed with experimental results.更多还原