This thesis demonstrates and investigates novel dual-polarization interferometric fiber-optic gyroscope (IFOG) configurations, which utilize optical compensation between two orthogonal polarizations to suppress errors caused by polarization nonreciprocity. Further, it provides a scheme for dual-polarization two-port IFOGs and details their unique benefits.

Dual-polarization IFOGs break through the restriction of the "minimal scheme," which conventional IFOGs are based on. These innovative new IFOGs have unique properties: They require no polarizer and have two ports available for signal detection. As such, they open new avenues for IFOGs to achieve lower costs and higher sensitivity.

Autorentext

Zinan Wang Sept.22, 1988 Data Center (Beijing), Agricultural Bank of China

The author has been studied fiber-optical sensors since 2008. In recent years, his researches mainly focus on the interferometric fiber-optic gyroscope (IFOG). His research achievements include novel structures and optimized signal processing methods for IFOGs. Especially, he discovers the optical compensation mechanism for IFOGs, together with his research group. With this mechanism, polarization errors can be efficiently suppressed within dual-polarization IFOGs.

Selected Publications

[1]Z. Wang, Y. Yang, Y. Li, X. Yu, Z. Zhang, and Z. Li. Quadrature demodulation with synchronous difference for interferometric fiber-optic gyroscopes. Opt Express, 2012, 20: 25421-25431

[2]Z. Wang, Y. Yang, P. Lu, Y. Li, D. Zhao, C. Peng, Z. Zhang, and Z. Li. All-Depolarized Interferometric Fiber-Optic Gyroscope Based on Optical Compensation. IEEE Photon J, 2014, 6: 7100208

[3]Z. Wang, Y. Yang,P. Lu, C. Liu, D. Zhao, C. Peng, Z. Zhang, and Z. Li. Optically compensated polarization reciprocity in interferometric fiber-optic gyroscopes. Opt Express, 2014, 22: 4908-4919

[4]Z. Wang, Y. Yang, P. Lu, R. Luo, Y. Li, D. Zhao, C. Peng, and Z. Li. Dual-polarization interferometric fiber-optic gyroscope with an ultra-simple configuration. Opt Lett, 2014, 39: 2463-2466

[5]Y. Yang, Z. Wang, and Z. Li. Optically compensated dual-polarization interferometric fiber-optic gyroscope. Opt Lett, 2012, 37: 2841-2843

[6]Y. Yang, Z. Wang, C. Peng and Z. Li. Unbiasedness of simultaneous independent measurement. Meas Sci Technol, 2012, 23: 085005

[7]Y. Yang, Z. Wang, C. Peng and Z. Li. Multidimensional gray-wavelet processing in interferometric fiber-optic gyroscopes. Meas Sci Technol, 2013, 24: 115203

[8]Y. Li, Z. Wang, Y. Yang, C. Peng, Z. Zhang, and Z. Li. A multi-frequency signal processing method for fiber-optic gyroscopes with square wave modulation. Opt Express,2014, 22: 1608-1618

[9]Y. Li, Z. Wang, C. Peng, Z. Li. Signal subspace analysis for decoherent processes during interferometric fiber-optic gyroscopes using synchronous adaptive filters. Appl Optics, 2014, 53: 6853-6860

[10]P. Lu, Z. Wang, Y. Yang, D. Zhao, S. Xiong, Y. Li, C. Peng, and Z. Li. Multiple Optical Compensation in Interferometric Fiber-optic Gyroscope for Polarization Nonreciprocal Error Suppression. IEEE Photon J, 2014, 6: 7200608

[11]P. Lu, Z. Wang, R. Luo, D. Zhao, C. Peng, and Z. Li. Polarization nonreciprocity suppression of dual-polarization fiber-optic gyroscope under temperature variation. Opt Lett, 2014, 40: 1826-1829

[12]Z. Wang, Y. Yang, P. Lu, Y. Li, C. Peng, Z. Zhang, and Z. Li. Optical compensation for compressing polarization nonreciprocity induced errors in interferometric fiber-optic gyroscopes. Appl Mech Mater, 2013, 303: 82-85

Introduction.- Polarization Error Compensation in Dual-Polarization IFOGs.- Theory Study of Optically Compensated Dual-Polarization IFOGs.- Output Properties of Dual-Polarization IFOGs.- Multi-Channel Signal Processing Methods for IFOGs.- Preliminary Test on an Engineering Prototype of Dual-Polarization IFOG.- Conclusions and Outlook.