M. Shadaram et al., TECHNIQUE FOR STABILIZING THE PHASE OF THE REFERENCE SIGNALS IN ANALOG FIBEROPTIC LINKS, Applied optics, 34(36), 1995, pp. 8283-8288
The effects of temperature and longitudinal stress on the phase delay
of reference signals in a fiber-optic link are discussed. A feedback s
ystem that uses a fiber-optic phase modulator is used to compensate fo
r the phase fluctuations of a reference signal in the link. The phase
deviations of a 50-MHz reference frequency that are caused by temperat
ure variations of the link is reduced by more than 95% on optimization
of the correction system. The advantages of this technique are that t
he fiber-optic phase modulator has a greater stability compared with t
he electronic phase modulators, and signal conversions from electric t
o optic and optic to electric are avoided. (C) 1995 Optical Society of
America