AM noise reduction in fiber optic rotation sensors

Hidehiko Negishi; Yoshinori Takeuchi; Yoshihiko Honjoya; Yuko Takei; Yukio Kasahara

doi:10.1117/12.135057

1 February 1992 AM noise reduction in fiber optic rotation sensors

Hidehiko Negishi, Yoshinori Takeuchi, Yoshihiko Honjoya, Yuko Takei, Yukio Kasahara

Proceedings Volume 1585, Fiber Optic Gyros: 15th Anniversary Conf; (1992) https://doi.org/10.1117/12.135057
Event: OE Fiber, 1991, Boston, MA, United States

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.

Citation Download Citation

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); https://doi.org/10.1117/12.135057

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