A clock system for a fiber optic gyroscope is provided that includes a
highly-tunable clock for the bias modulation and a separate asynchronous
high-speed clock for the photodetector sampling. By separating the two
clocks rather than using two derivatives of the same clock, the clock
system and method can provide both the tunability objective of the bias
modulation clock and the high-speed objective of the sampling clock,
while using readily available, lower performance, radiation-hardened
electronics parts.