Polarization multiplexed optical receiver and method for polarization multiplexed optical receiver

摘要

Can improve the precision of light intensity mismatch between the polarizations that are accumulated in the optical transmission path of the light receiving system, receiving a polarized light signal having a high quality, the polarization multiplexed light and the polarization multiplexed optical receiver I will provide a communication method. A semiconductor optical device for adjusting the respective light signal intensity of the TE mode and the TM mode polarization multiplexed optical signal, the polarization multiplexed optical receiver according to the present invention, TM mode light and TE mode light signal and the polarization multiplexed optical signal calculates a polarization beam splitter demultiplexes the signals, demultiplexed by the polarization beam splitter the optical signal intensity as well be adjusted by the semiconductor element, the light intensity ratio of the TM mode light signal between the TE mode light signal , and a control circuit for feedback control of the semiconductor device light intensity ratio was the operation to a desired value.