WAVELENGTH DIVISION MULTIPLEXING OPTICAL RECEIVER

摘要

The present invention relates to a wavelength division multiplexing optical receiver and eliminates excess loss of one polarization component while eliminating the need for a polarization-independent operation of a light receiver. An input waveguide, made of a silicon wire waveguide, is connected to a loop waveguide equipped with a polarization rotator over a polarization beam splitter. A ring waveguide equipped with an output waveguide configuring an add-drop ring resonator array is optically connected to the loop waveguide. The output light from ports at both sides of the output waveguide is incident onto first and second light-receiving surfaces of alight receiver such that the optical distances are equal to each other.

主权项

1. A wavelength division multiplexing optical receiver, comprising:
an input waveguide made of a silicon wire waveguide; apolarization beam splitter connected to the input waveguide in order to divide light inputted from the input waveguide into a first signal and a second signal in accordance with the polarization plane; a loop waveguide connected to the output end of the polarization beam splitter and made of a silicon wire waveguide through which the first signal and the second signal propagate in opposite directions from each other; a polarization rotator inserted into the loop waveguide in order to rotate the polarization plane of the second signal by 90°; a number of ring waveguides made of silicon wire waveguides having different optical path lengths optically coupled to the loop waveguide on the add port side; output waveguides made of silicon wire waveguides optically coupled to each of the ring waveguides on the drop port side and having two output ports; and light receivers connected to an output waveguide without having to go via a polarization rotator or a polarization multiplexer in such a manner that the optical distances between the polarization beam splitter and a first light-receiving surface and between the polarization beam splitter and a second light-receiving surface are equal.