11 November 2014 Optical fiber voltage sensor based on Michelsion interferometer using Fabry-Perot demodulation interferometer
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Abstract
We present an optical fiber voltage sensor by Michelsion interferometer (MI) employing a Fabry-Perot (F-P) interferometer and the DC phase tracking (DCPT) signal processing method. By mounting a MI fabricated by an optical fiber coupler on a piezoelectric (PZT) transducer bar, a dynamic strain would be generated to change the optical path difference (OPD) of the interferometer when the measured voltage was applied on the PZT. Applying an F-P interferometer to demodulate the optical intensity variation output of the MI, the voltage can be obtained. The experiment results show that the relationship between the optical intensity variation and the voltage applied on the PZT is approximately linear. Furthermore, the phase generate carrier (PGC) algorithm was applied to demodulate the output of the sensor also.
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Xinwei Chen, Shengnan He, Dandan Li, Kai Wang, Yan'en Fan, Shuai Wu, "Optical fiber voltage sensor based on Michelsion interferometer using Fabry-Perot demodulation interferometer", Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92741Y (11 November 2014); doi: 10.1117/12.2073392; https://doi.org/10.1117/12.2073392
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