Analysis of fabrication error and optimization technique of λ/4 wave plate for fiber optical current transformer

Yongguang Wang; Guochen Wang; Boya Zhang; Wei Gao; Zhuo Wang

doi:10.1117/12.2602392

9 October 2021 Analysis of fabrication error and optimization technique of λ/4 waveplate for fiber optical current transformer

Yongguang Wang, Guochen Wang, Boya Zhang, Wei Gao, Zhuo Wang

Author Affiliations +

Proceedings Volume 11901, Advanced Sensor Systems and Applications XI; 1190105 (2021) https://doi.org/10.1117/12.2602392
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

The principle of fiber optical current transformer and the function of λ/4 wave plate are described in this paper. We propose and demonstrate three kinds of main fabrication errors of λ/4 wave plate, including fiber material error, axial angle error and length interception error. In order to reduce the errors above, an elliptical core polarization-maintaining fiber, which is relatively temperature-insensitive and has a long beat length 20 mm, is used as the wave plate fiber. And we build a set of all-fiber λ/4 wave plate fabrication platform utilizing polarization analyzer and optical microscope. Therefore, the excellent performance λ/4 wave plate (DOP<98%, PER<0.2dB) was obtained with the fabrication platform. Experimental results of DC current measurement (100A˜3000A) and temperature test (-40°C˜85°C) show that the measurement accuracy of prototype with the fabricated λ/4 wave plate is better than 0.2S, which verified that the analysis of fabrication error and optimization technique of λ/4 wave plate in this paper can improves the performance of FOCT effectively

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Yongguang Wang, Guochen Wang, Boya Zhang, Wei Gao, and Zhuo Wang "Analysis of fabrication error and optimization technique of λ/4 waveplate for fiber optical current transformer", Proc. SPIE 11901, Advanced Sensor Systems and Applications XI, 1190105 (9 October 2021); https://doi.org/10.1117/12.2602392

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