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25 October 2018 Sagnac interferometer with polarization maintaining fiber for vector transversal loading measurement
Xinying Chen, Weisheng Liu, Rui Wu, Shangwu Yang, Jin Yun, Hongyan Fu
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Proceedings Volume 10822, Real-time Photonic Measurements, Data Management, and Processing III; 108220S (2018) https://doi.org/10.1117/12.2501221
Event: SPIE/COS Photonics Asia, 2018, Beijing, China
Abstract
In this paper, a Sagnac interferometer with polarization maintaining fiber (PMF) for vector transversal loading measurement has been proposed and experimentally demonstrated. The light propagated in different axes of the PMF has different velocity because of fiber birefringence, which results in phase difference, and thus interferometer pattern is produced. When the birefringence parameters are affected by transversal loading, the phase difference of the light propagating in different axes will change, and as a result of the interferometer pattern of the Sagnac loop shifts. When transversal loading with the opposite direction is applied on the sensing fiber, the interferometer pattern also shifts, but oppositely to longer or shorter wavelength, by monitoring which vector transversal loading measurement can be achieved. The sensing characteristics when transversal loading is applied in different angles have also been studied. The proposed measurement method has a simple structure, and is easy to implement, which shows a good application prospects in the sensing field.
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Xinying Chen, Weisheng Liu, Rui Wu, Shangwu Yang, Jin Yun, and Hongyan Fu "Sagnac interferometer with polarization maintaining fiber for vector transversal loading measurement", Proc. SPIE 10822, Real-time Photonic Measurements, Data Management, and Processing III, 108220S (25 October 2018); https://doi.org/10.1117/12.2501221
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KEYWORDS
Sagnac interferometers
Polarization maintaining fibers
Interferometers
Sensing systems
Fiber optics sensors
Sensors
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