A practical closed-loop approach to signal processing in the fiber gyroscope is presented. A triangle wave phase modulation is used in which the slope of the increasing and decreasing sections of the modulation are adjusted independently to compensate for the phase difference due to rotation rate. Accordingly, the phase difference due to rotation is determined solely by the difference in the times spent on each of the legs of the triangle wave. By synchronizing these times to a clock signal, the output becomes a digital measure of rotation angle.

Date Published: 13 February 1990
PDF: 13 pages
Proc. SPIE 1169, Fiber Optic and Laser Sensors VII, (13 February 1990); doi: 10.1117/12.963062

Published in SPIE Proceedings Vol. 1169:
Fiber Optic and Laser Sensors VII
Ramon P. DePaula; Eric Udd, Editor(s)