Research on the approach of restraining Faraday effect of fiber optic gyroscope with twisting fiber reversely

Cheng Xiao; Jun Liu; Jianling Yin; Jun Lu

doi:10.1117/12.2069481

3 December 2014 Research on the approach of restraining Faraday effect of fiber optic gyroscope with twisting fiber reversely

Cheng Xiao, Jun Liu, Jianling Yin, Jun Lu

Author Affiliations +

Proceedings Volume 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors; 92972K (2014) https://doi.org/10.1117/12.2069481
Event: International Symposium on Optoelectronic Technology and Application 2014, 2014, Beijing, China

Abstract

Faraday magneto-optic effect of fiber optic gyroscope(FOG) is nonreciprocal error source that affects the performance of FOG, especially the precision of FOG. The magnetic sensitivity mechanism of FOG is introduced in this paper and the main source of radial and axial magnetic sensitivity error is analyzed. The circular birefringence of the fiber is improved by twisting. With coupled wave equations of twist fiber, an expression that can evaluate circular birefringence degree of fiber is obtained. Based on the above analysis, this paper puts forward an approach that a length of reverse twist fiber is spliced onto the original fiber coil of FOG. This approach can produce high circular birefringence. The reciprocity phase of original fiber coil is compensated so that the purpose that restrains magnetic sensitivity error of FOG is achieved. The feasibility of this method is discussed.

Citation Download Citation

Cheng Xiao, Jun Liu, Jianling Yin, and Jun Lu "Research on the approach of restraining Faraday effect of fiber optic gyroscope with twisting fiber reversely", Proc. SPIE 9297, International Symposium on Optoelectronic Technology and Application 2014: Laser and Optical Measurement Technology; and Fiber Optic Sensors, 92972K (3 December 2014); https://doi.org/10.1117/12.2069481

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KEYWORDS

Magnetism

Birefringence

Fiber optic gyroscopes

Error analysis

Polarization

Magneto-optics

Fiber optics

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