1 February 1992 AM noise reduction in fiber optic rotation sensors
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Abstract
We evaluated the phase and amplitude characteristics of output noise in fiber optic rotation sensors with a single-mode fiber sensing loop. We found that the major source of the noise was amplitude modulation (AM) noise caused by a phase modulator, and that the AM noise always had an approximate 90 degrees phase difference from the rotation signal. Thus, by adjusting the lock-in reference signal phase to the node of the AM noise, the output drift was markedly reduced to about 2 deg/h.
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Hidehiko Negishi, Hidehiko Negishi, Yoshinori Takeuchi, Yoshinori Takeuchi, Yoshihiko Honjoya, Yoshihiko Honjoya, Yuko Takei, Yuko Takei, Yukio Kasahara, Yukio Kasahara, } "AM noise reduction in fiber optic rotation sensors", Proc. SPIE 1585, Fiber Optic Gyros: 15th Anniversary Conf, (1 February 1992); doi: 10.1117/12.135057; https://doi.org/10.1117/12.135057
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