Directly measuring mode purity of single component in known superposed optical vortices

Mode purity is a vital quality reference of an optical vortex. This work proposes a self-interference method to directly measure the mode purity of a single component in known superposed optical vortices, based on the modified phase-shifting technology we proposed. This method has excellent flexibil...

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Bibliographic Details
Published in:Optics communications 2022-04, Vol.508, p.127600, Article 127600
Main Authors: Wang, Chen, Ren, Yuan, Liu, Tong, Chen, Linlin, Qiu, Song, Ding, You, Zhao, Jie, Li, Ruijian
Format: Article
Language:English
Subjects:
Mode purity
Modified phase-shifting technology
Optical vortex
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Summary:Mode purity is a vital quality reference of an optical vortex. This work proposes a self-interference method to directly measure the mode purity of a single component in known superposed optical vortices, based on the modified phase-shifting technology we proposed. This method has excellent flexibility, rapidity, and robustness, which can be applied to various occasions and harsh conditions. Careful alignment and optimized error analysis allow us to generate and measure optical vortices with mode purity as high as 99.997%. •Experimentally, we propose a self-interference method to directly measure a single component in known superposed optical vortices.•This method has excellent flexibility, rapidity, and robustness, which can be applied to various occasions.•Measured mode purity is as high as 99.997%, which is the highest value reported so far as the author knows.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2021.127600