A simple open-loop approach to a standard fiber-optic gyroscope that uses an intensity-modulated source is described. Direct readout of the Sagnac effect in an open-loop form is obtained by applying a sinusoidal modulation to the source and the phase modulator at the proper frequency, with the modulation depth of the source adjusted appropriately. Experimental results show good linearity over a wide dynamic range.
© 1988 Optical Society of America
Original Manuscript: December 4, 1987
Manuscript Accepted: March 18, 1988
Published: June 1, 1988
Moonsu Oh, Manho Chung, and Yongduk Kim, "Open-loop fiber-optic gyroscope using intensity-modulated source and phase modulation," Opt. Lett. 13, 521-523 (1988)