Optical phase shifting with acousto-optic devices |
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Authors: | Li Enbang Yao Jianquan Yu Daoyin Xi Jiangtao Chicharo Joe |
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Institution: | College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China. enbang@uow.edu.au |
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Abstract: | A novel optical phase-shifting method based on a well-known acousto-optic interaction is proposed. 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. The proposed approach is confirmed with experimental results. |
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