title: Optical phase shifting with acousto-optic devices.
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.
authors.affiliation: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China. enbang@uow.edu.au
authors.forename: Enbang
authors.initials: E
authors.lastname: Li
authors.forename: Jianquan
authors.initials: J
authors.lastname: Yao
authors.forename: Daoyin
authors.initials: D
authors.lastname: Yu
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Xi
authors.forename: Joe
authors.initials: J
authors.lastname: Chicharo