Patent ID: 7324758
Filing Date: 2008-01-29
Classification: H04B

Abstract:
1. An optical dispersion monitoring apparatus for monitoring dispersion based on a waveform of an input optical signal, comprising: a characteristic amount detecting section selectively detecting a physical amount corresponding to a location where waveform distortion occurring depending on dispersion appears distinctively in the waveform of said input optical signal; and a dispersion information extracting section extracting information related to the dispersion which has occurred in said optical signal, based on a comparison between the physical amount detected in said characteristic amount detecting section and a reference value indicated by a reference signal, to output the information, wherein said characteristic amount detecting section includes: wherein said dispersion information extracting section compares the reference value indicated by the reference signal with the voltage level detected in said signal transition position detecting section, and outputs a signal corresponding to the comparison result as dispersion information; and wherein said signal transition position detecting section detects the voltage level corresponding to crossing points in an eye pattern of the electrical signal converted in said light receiving section.