| 摘要 |
Disclosed is a dispersion compensation monitoring device that can be applied for an optical communication system for dispersion compensation, and that can simplify the device configuration and reduce the number of procedures. According to the present invention, photo-electric conversion is performed by an optical front end for an optical signal obtained by dispersion compensation, and the output is amplified to a predetermined level by an automatic gain amplifier. One of the outputs of the amplifier is branched by a power divider, one of the branched outputs being detected thereafter by a power detector, while from the other output of the amplifier, a high frequency signal element is extracted by a high-pass filter and the strength of the signal is detected by another power detector. The outputs of the power detectors are transmitted to an identification circuit that determines the adequateness of a dispersion compensation value by dividing the outputs of the power detectors, comparing the results with the border values of the dispersion stress range, and defining the comparison result as a dispersion compensation value monitor output.
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