Fiber optic current sensor using an internal trigger sampling technique

Hyoung-Jun Park; Chan Il Yeo; Dong Hoon Son; Keo-Sik Kim; Hyun Seo Kang; Sung Chang Kim; Minho Song

doi:10.1117/12.2263243

23 April 2017 Fiber optic current sensor using an internal trigger sampling technique

Hyoung-Jun Park, Chan Il Yeo, Dong Hoon Son, Keo-Sik Kim, Hyun Seo Kang, Sung Chang Kim, Minho Song

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 1032327 (2017) https://doi.org/10.1117/12.2263243
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

We present an advanced demodulation technique for a fiber-optics interferometric current transducer. A quadrature sampling method with internal triggers was adopted for structural simplification and cost-effective phase demodulation. The internal triggers for quadrature signal processing were generated at zero crossing points of an ac-coupled reference signal, which was distinguished from the current-induced interference signal by utilizing fiber Bragg grating. Phase variation was extracted from the arctangent demodulation process. The proposed technique demonstrated accurate and stable phase demodulations performance and better than that of the conventional lock-in amp demodulation.

Citation Download Citation

Hyoung-Jun Park, Chan Il Yeo, Dong Hoon Son, Keo-Sik Kim, Hyun Seo Kang, Sung Chang Kim, and Minho Song "Fiber optic current sensor using an internal trigger sampling technique", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 1032327 (23 April 2017); https://doi.org/10.1117/12.2263243

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