A signal processing device that processes a digital signal formed by sampling an electric
signal using a clock signal, the electric signal being obtained by converting an optical signal …

A signal processing circuit includes: a first compensator configured to compensate for
waveform distortion corresponding to chromatic dispersion of a received optical signal by …

A polarization multiplexed receiver includes a polarization separator and optical mixing,
detecting and analog-to-digital components. The polarization separator receives …

BACKGROUND Coherent optical communication systems are known in which an optical
signal is transmitted on an optical fiber from a transmitter to a receiver. In the receiver, the …

Consistent with the present disclosure, a method and system for detecting a clock phase of
an optical signal in a coherent receiver is provided that is insensitive to polarization mode …

An optical receiver includes a splitter that splits a local oscillator lightwave into a first local
oscillator lightwave and a second local oscillator lightwave; a measurement unit that …

An optical receiver includes a photo-detector that converts a received optical signal into an
electric signal and outputs the electric signal, a converter that converts the electric signal into …

An optical transmission system includes: a transmission node to transmit wavelength-
multiplexed light of a plural wavelengths arranged in a predetermined transmission band; …

An optical receiving apparatus branches an optical signal, photo-electric-converts the
branched signals, and compensates dispersion in each of the converted electrical signals …

In order to reduce influence of noise due to a phase deviation, and to estimate an amount of
phase compensation with Supe rior accuracy in a polarization multiplexing/demultiplexing …