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A Novel Approach to Double the Sensitivity of Polarization Maintaining Interferometric Fiber Optic Gyroscope

State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
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Sensors 2020, 20(13), 3762; https://doi.org/10.3390/s20133762
Received: 22 June 2020 / Revised: 29 June 2020 / Accepted: 3 July 2020 / Published: 5 July 2020
(This article belongs to the Special Issue Fiber Optic Sensing Technology)
In this paper, a novel optical approach to double the sensitivity to angular rate of interferometric fiber optic gyroscope (IFOG) is proposed. Two fiber polarization combiner/splitters (FPCSs), as the key components, are added in the traditional IFOG light path. The FPCSs are able to either combine two orthogonal polarizations transmitting at two different polarization-maintaining fibers (PMFs) into the two orthogonal axes of one PMF, respectively, or split two polarizations transmitting at the two orthogonal axes of one PMF into two polarizations to transmit at two different PMFs, respectively. Through the specific placement and coupling of these two FPCSs, the incident light can transmit twice along the polarization-maintaining fiber coil (PMFC). The novel approach is verified experimentally and the experimental results show consistency with the theoretical analysis. The proposed approach is able to double the sensitivity of IFOGs and can increase the signal-to-noise ratio (SNR) without increasing the length of PMFC, which is very susceptible to environmental influences and is of great significance in the technical improvement of IFOGs, as well as the miniaturization of IFOGs. View Full-Text
Keywords: polarization maintaining interferometric fiber optic gyroscope; double sensitivity; fiber polarization combiner/splitter polarization maintaining interferometric fiber optic gyroscope; double sensitivity; fiber polarization combiner/splitter
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MDPI and ACS Style

Zhang, D.; Liang, C.; Li, N. A Novel Approach to Double the Sensitivity of Polarization Maintaining Interferometric Fiber Optic Gyroscope. Sensors 2020, 20, 3762. https://doi.org/10.3390/s20133762

AMA Style

Zhang D, Liang C, Li N. A Novel Approach to Double the Sensitivity of Polarization Maintaining Interferometric Fiber Optic Gyroscope. Sensors. 2020; 20(13):3762. https://doi.org/10.3390/s20133762

Chicago/Turabian Style

Zhang, Dengwei; Liang, Cui; Li, Nan. 2020. "A Novel Approach to Double the Sensitivity of Polarization Maintaining Interferometric Fiber Optic Gyroscope" Sensors 20, no. 13: 3762. https://doi.org/10.3390/s20133762

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