We evaluated the accuracy of an optical frequency comb in optical fibers by measuring the frequency shift after a sideband from an electro-optic modulator had passed through the fiber. We found that a frequency drift of a few hertz was due largely to a variation in the ambient temperature that corresponded to an increase in the square root of the Allan variance to 0.66 Hz.
© 1999 Optical Society of America
[Optical Society of America ]
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(230.4110) Optical devices : Modulators
K. Imai, Y. Zhao, M. Kourogi, B. Widiyatmoko, and M. Ohtsu, "Accuracy of optical frequency comb generation in optical fiber," Opt. Lett. 24, 214-216 (1999)