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Fiber-optic transmission systems with dispersion measurement and - compensation
Fiber-optic transmission systems with dispersion measurement and - compensation
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机译：具有色散测量和-补偿的光纤传输系统
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摘要
An optical transmission system includes means for measuring optical dispersion in the optical path, and a controllable element such as a dispersion compensator, operable in dependence on the measured value of dispersion. A low frequency dither on the optical signal causes timing jitter which varies according to the dispersion in the optical path. The timing jitter is extracted from a clock signal recovered from the optical signal. This jitter is correlated with the original dither to remove jitter effects caused by other mechanisms. Thus a value for dispersion is derived which can be used for monitoring or control purposes.
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