Patent ID: 9285539
Filing Date: 2016-03-15
CPC Classification: G02B

Claim Text:
1. An optical receiver, comprising: a polarizing splitting grating coupler (PSGC) having an input port, a first output port and a second output port, wherein the input port is configured to receive an input optical signal having two orthogonal polarization components and multiple wavelengths, and wherein the first output port is configured to provide a first optical signal having a transverse-electric (TE) mode corresponding to one of the two polarization components and the second output port is configured to provide a second optical signal having the TE mode corresponding to the other of the two polarization components; a first optical waveguide optically coupled to the first output port; a second optical waveguide optically coupled to the second output port; a wavelength-selective filter, optically coupled to the first optical waveguide and the second optical waveguide, having output ports configured to provide output optical signals having the wavelengths in the first optical signal and the second optical signal, wherein a given output port is configured to provide a given output optical signal having a given wavelength in one of the first optical signal and the second optical signal, wherein the wavelength-selective filter includes pairs of ring-resonator drop filters optically coupled to the first optical waveguide and the second optical waveguide, and optically coupled to the optical detectors, wherein a first ring-resonator drop filter in a given pair of ring-resonator drop filters includes one of the output ports and is configured to output the given output optical signal having the given wavelength in the first optical signal, and wherein a second ring-resonator drop filter in the given pair of ring-resonator drop filters includes another of the output ports and is configured to output the given output optical signal having the given wavelength in the second optical signal; and optical detectors, optically coupled to the wavelength-selective filter, configured to provide electrical signals corresponding to the output optical signals, wherein a given optical detector is optically coupled to at least the given output port and is configured to provide a given electrical signal corresponding to at least the given output optical signal.