17 May 2011 Interferometric phase sensor using single-ended polarization maintaining fiber in Sagnac interferometer
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77531F (2011) https://doi.org/10.1117/12.885973
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
Abstract
An interferometric phase sensor is proposed and demonstrated for strain sensing based on a Sagnac interferometer including polarization maintaining fiber (PMF). Since the conventional PMF Sagnac interferometer includes a PMF in the loop by splicing both ends with the two ends of 50:50 coupler, it has been difficult to apply the two-ended PMF in the practical applications. In this paper, we propose a simple configuration by adding one more 50:50 coupler in the Sagnac loop to connect the PMF with one splicing process for a remote sensing position. Instead of tracking the shift of periodic spectrum by optical spectrum analyzer, higher sensitive method is proposed by interrogating a phase variation of the interferometric optical signal from the modified Sagnac interferometer including single-ended PMF.
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Yeo Reum Yoon, Min Ho Seo, Hwi Don Lee, Myung Yung Jeong, and Chang-Seok Kim "Interferometric phase sensor using single-ended polarization maintaining fiber in Sagnac interferometer", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77531F (17 May 2011); doi: 10.1117/12.885973; https://doi.org/10.1117/12.885973
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