Temperature Correlation Effect of Transverse Magneto-Optic Error in Miniaturized Fiber Optic Gyroscope

• Published in: IEEE transactions on instrumentation and measurement Vol. 71; p. 1
• Main Authors: Wang, Xiaowei, Song, Ningfang, Jin, Jing, Zhang, Zuchen, Wang, Xiaxiao, Chen, Zhuo
• Format: Journal Article
• Language: English
• Published: New York IEEE 2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Correlation; Correlation coefficients; Crystal fibers; Environmental adaptability; Fiber optic gyroscope; Fiber optic gyroscopes; Finite element method; Magnetic fields; Magneto-optic error; Optical fiber polarization; Optical fiber sensors; Optical fiber theory; Perturbation; Photonic crystals; Refractivity; Temperature correlation effect; Temperature dependence; Temperature measurement; Verdet constant
• ISSN: 0018-9456; 1557-9662
• DOI: 10.1109/TIM.2022.3203458

A temperature correlation effect of transverse magneto-optic error in miniaturized fiber optic gyroscopes is proposed. The theoretical model based on mode perturbation and temperature correlation terms is established. The temperature dependence of the Verdet constant is measured by the thermo-controlled Verdet constant measurement system based on the phase-sensitive detection. And the temperature dependence of the refractive index is analyzed by the multi-physics finite element method. The experiment based on the miniaturized FOG prototype with two kinds of fibers is carried out. Experimental result shows that the average temperature correlation coefficients of TMOE with polarization-maintaining fibers and photonic-crystal fibers are 5.335×10 -4 °/h/Gs/°C and 2.377×10 -4 °/h/Gs/°C, which are in good agreement with the analysis results.