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Heterodyne interferometer with two parallel-polarized input beams for high-resolution roll angle measurement

Qi, Jingya; Wang, Zhao; Huang, Junhui; Wang, Qing; Gao, Jianmin

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Authors

Jingya Qi

Junhui Huang

Jianmin Gao



Abstract

We have proposed an improved heterodyne interferometric roll measurement system with enhanced resolution in this paper. Two beams with different frequencies but with the same polarization state input to the interferometer are provided by two acousto-optic modulators. A quarter-wave plate is employed in each path before the two beams are combined to generate a beat frequency. A mathematical model for the measurement system is established based on Jones’ calculus. The measurement resolution is doubled because the sensitive areas of the two beams appear simultaneously. Experimental results show that in the range of 0.1° the gain coefficient reaches 229 which is twice that of the traditional method.

Citation

Qi, J., Wang, Z., Huang, J., Wang, Q., & Gao, J. (2019). Heterodyne interferometer with two parallel-polarized input beams for high-resolution roll angle measurement. Optics Express, 27(10), 13820-13830. https://doi.org/10.1364/oe.27.013820

Journal Article Type Article
Acceptance Date Apr 21, 2019
Online Publication Date Apr 29, 2019
Publication Date May 13, 2019
Deposit Date May 29, 2019
Publicly Available Date Mar 29, 2024
Journal Optics Express
Publisher Optica
Peer Reviewed Peer Reviewed
Volume 27
Issue 10
Pages 13820-13830
DOI https://doi.org/10.1364/oe.27.013820

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Copyright Statement
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.





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