Use of dual-frequency excitation method to improve the accuracy of an optical current sensor

Shuping Wang; Avinash Karri; Yossi Harlev

doi:10.1117/12.826817

21 August 2009 Use of dual-frequency excitation method to improve the accuracy of an optical current sensor

Shuping Wang, Avinash Karri, Yossi Harlev

Proceedings Volume 7420, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications III; 74200I (2009) https://doi.org/10.1117/12.826817
Event: SPIE Photonic Devices + Applications, 2009, San Diego, California, United States

Abstract

We report a simple yet effective method to improve the accuracy of an optical current sensor (OCS) by compensating the temperature dependency of the Verdet constant with a low-power source operating at a known frequency combined with a lookup table. Neither a complex digital signal processing system nor extra rare earth bulk glass material is used to achieve the accuracy of the current's measurement. Modeling and simulations are carried out. An OCS has been designed and fabricated. The dynamic range of 1620 RMS ampere with a sensitivity of 0.36 ampere is achieved with a single-path SF57 bulk glass.

Citation Download Citation

Shuping Wang, Avinash Karri, and Yossi Harlev "Use of dual-frequency excitation method to improve the accuracy of an optical current sensor", Proc. SPIE 7420, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications III, 74200I (21 August 2009); https://doi.org/10.1117/12.826817

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