12 November 1996 Depolarized single-mode fiber optic gyroscope
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Abstract
In this paper, a new type of depolarized fiber optic gyroscope is described. Sensing coil is constructed by single-mode optical fiber with 200 meters length and 70 mm wounding diameter. A superluminescent diode source is used to reduce both the coherent scattering effect and Kerr effect. Two depolarizers with 1.0 percent degree of polarization and one polarizer with 40dB extinction ratio were used to reduce the output bias drift and improve the scale factor stability. A specially designed PZT phase modulator is used to suppress the AM noise. Under laboratory environment, the zero point error of 1.5 degrees/hr over seven hours with one second time constant and 700 ppm scale factor with +/- 100 degrees/sec maximum rotating rate were achieved for this depolarized I-FOG.
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Fengping Yan, Fengping Yan, Yi Yao, Yi Yao, Shuisheng Jian, Shuisheng Jian, HongJie Xu, HongJie Xu, Xinzhen Du, Xinzhen Du, Weixu Zhang, Weixu Zhang, } "Depolarized single-mode fiber optic gyroscope", Proc. SPIE 2837, Fiber Optic Gyros: 20th Anniversary Conference, (12 November 1996); doi: 10.1117/12.258203; https://doi.org/10.1117/12.258203
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