Validation of Perfectly Rotating Polarized Light using Sagnac Interferometry: A Comparison of Python Simulations and Machine Learning Technique

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Publication Details

Author list: Kaewon R.; Kittawee K.; Wongbongkotpaisan J.; Bhatranand A.

Publisher: Society of Photo-optical Instrumentation Engineers

Publication year: 2025

Journal: Proceedings of SPIE (0277-786X)

Volume number: 13518

ISBN: 978-151068829-2

ISSN: 0277-786X

eISSN: 1996-756X

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85219542307&doi=10.1117%2f12.3058666&partnerID=40&md5=dfd85de1fcaf2eb6f7eca9aa968895fb

Languages: English-Great Britain (EN-GB)

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Abstract

This article presents the construction and validation of perfectly rotating linearly polarized light (RLPL) using phase-shifting techniques within the framework of a Sagnac interferometer. Jones calculus theory is employed to analyze the linear propagation characteristics of the rotating linearly polarized light beam. The perfectly constructed linearly polarized rotating light conforms to the mathematical model derived from Jones calculus theory. Experimental imaging results of a CCD camera or charge-coupled device camera within a Sagnac interferometer yield fringe pattern of rotating polarized light. This output light is then compared against simulations generated by Python programs to verify the properties of perfectly linearly polarized rotating light once again. The article also utilizes machine learning processes by capturing images of the light insertion fringes and examining the properties of polarized light to demonstrate that the linearly polarized rotating light from this setup of Sagnac interferometers adheres to the conditions predicted by theoretical analysis. The output results of RLPL presented can be applied to optical metrology for non-destructive sample characterization. © 2025 SPIE.

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