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1 February 1992 AM noise reduction in fiber optic rotation sensors
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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.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hidehiko Negishi, Yoshinori Takeuchi, Yoshihiko Honjoya, Yuko Takei, and Yukio Kasahara "AM noise reduction in fiber optic rotation sensors", Proc. SPIE 1585, Fiber Optic Gyros: 15th Anniversary Conf, (1 February 1992);

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