DISPERSION COMPENSATION METHOD AND CIRCUIT, AND OPTICAL RECEIVER

摘要

PROBLEM TO BE SOLVED: To attain an electric dispersion compensation which is simple and is high in compensation effect.

SOLUTION: When receiving optical signals transmitted from an optical transmitter 1 having a chirp parameter by a photodetector 3 through an optical fiber 2 and compensating waveform degradation caused by the group speed dispersion of the optical fiber 2 in an electric dispersion compensation filter 4, for the amplitude characteristics of the dispersion compensation, the gain becomes almost maximum at a frequency fd0to be almost minimum in the amplitude characteristics of a transmission function Ires(f) constituted of the optical transmitter 1, the optical fiber 2 and the photodetector 3 and the gain becomes almost minimum at a frequency fu1to be almost maximum in the amplitude characteristics of the transmission function Ires(f).

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