Patent ID: 7272326
Filing Date: 2007-09-18
Classification: H04B

Abstract:
1. An optical receiver for receiving a signal light propagated from an optical path, the signal light having a concave frequency response influenced by an accumulated dispersion of the optical path, the optical receiver comprising: an optical-to-electrical converter for converting the signal light to an electrical current; a current-to-voltage converter for receiving the electrical current from the optical-to-electrical converter and for outputting a voltage signal corresponding to the electrical current; a first filter with a convex frequency response having a peak frequency to compensate the concave frequency response of the signal light, the first filter filtering the voltage signal from the current-to-voltage converter and outputting an electrical signal corresponding to the signal light; and a control signal generator having a second filter and a divider, the second filter, which is a band-pass filter, receiving the voltage signal from the current-to-voltage converter to filter and outputting a filtered signal with a magnitude at a center frequency of the band pass filter, the divider outputting a control signal to the first filter by receiving the voltage signal from the current-to-voltage converter and the filtered signal from the second filter, the control signal being a ratio of the filtered signal to the voltage signal, wherein the peak frequency of the first filter is varied by the control signal from the control signal generator.