Influence of disturbance in bent spun fiber on polarization evolution

Yulin Wu; Zhiwen Deng; Yuejiang Song

doi:10.1117/12.2616425

26 July 2022 Influence of disturbance in bent spun fiber on polarization evolution

Yulin Wu, Zhiwen Deng, Yuejiang Song

Proceedings Volume 12279, 2021 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 122790N (2022) https://doi.org/10.1117/12.2616425
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

Spun fiber has been used for current-sensing applications for decades. However, in actual situation, disturbance like squeezing or bending of spun fibers often causes evolution of polarization and eventually causes Faraday phase shift error. In this paper, we try to find out how bending will influence the polarization state of propagating light in spun fiber. We use a big bending spun fiber coil (50 cm in diameter) with a small disturbance coil (2-3cm in diameter) to easily simulate and quantify the magnitude of fiber bending. We calculate the polarization states of the left-hand and right-hand circular polarizations by solving differential equation of a spun fiber coil placed in the magnetic field generated by a current. Our results show that fiber bending will weaken the polarization-maintaining ability of spun fiber, causing polarization state oscillates periodically.

Citation Download Citation

Yulin Wu, Zhiwen Deng, and Yuejiang Song "Influence of disturbance in bent spun fiber on polarization evolution", Proc. SPIE 12279, 2021 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 122790N (26 July 2022); https://doi.org/10.1117/12.2616425

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