We show that an electronic servo loop can be closed stably and accurately on a fiber-optic gyroscope by using the phase-modulation technique. Using a closed-loop fiber-optic gyroscope with gated two-harmonic phase modulation, an experiment on the linearity was performed; a linearity of approximately 0.5% was achieved below 90°/sec. The parameter dependencies of the linearity are discussed and theoretical and experimental results given.
© 1988 Optical Society of America
Original Manuscript: July 27, 1987
Manuscript Accepted: February 19, 1988
Published: May 1, 1988
Moonsu Oh, Manho Chung, and Yongduk Kim, "Effects of the second harmonic and the duty cycle on the scale factor of a fiber-optic gyroscope with gated two-harmonic phase modulation," Opt. Lett. 13, 410-412 (1988)