Abstract

Two-wavelength interferometers can extend an unambiguous measurement range; however, they suffer from complex optical configurations. To simplify the optical setup for a two-wavelength common-path off-axis interferometer, we propose a dual-channel two-wavelength interferometer using a polarized cube beam splitter. In contrast with the previously presented two-wavelength common-path off-axis interferometer, the proposed method has a simple setup, in which only one polarized cube beam splitter is inserted into the 4f system. With the help of polarization modulation, two single-wavelength interferograms can be captured simultaneously. Several experimental results are presented to demonstrate the advantages and effectiveness of the proposed method.

© 2021 Optical Society of America

Off-axis common-path digital holography using a cube beam splitter

Yunhao Li, Lei Liu, Yizhe Liu, Mengyao Wang, Zhi Zhong, and Mingguang Shan
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Parallel-quadrature on-axis phase-shifting common-path interferometer using a polarizing beam splitter

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Simple phase shifting by polarizer rotations in a cube beam-splitter interferometer

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Angular dependence of polarizing beam-splitter cubes

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Single-shot dual-wavelength off-axis quasi-common-path digital holography using polarization-multiplexing

Mingguang Shan, Lei Liu, Zhi Zhong, Bin Liu, Guangyu Luan, and Yabin Zhang
Opt. Express 25(21) 26253-26261 (2017)