Patent ID: 9395494
Filing Date: 2016-07-19
CPC Classification: G02B,H04B

Claim Text:
1. An optical apparatus comprising: a semiconductor layer to propagate light from at least one light source; a mirror having an echelle grating reflective surface that is provided on a facet of a trench substantially disposed inside the semiconductor layer, to reflect and refocus the propagating light; at least one input optical waveguide disposed inside the semiconductor layer to spatially disperse the propagating light onto the mirror; and at least one output optical waveguide disposed inside the semiconductor layer to receive at least a portion of light reflected by the mirror, wherein the input and output optical waveguides are disposed under a determined angle relative to the mirror reflective surface, to provide substantially total internal reflection of light by the mirror, and wherein at least one of the at least one of the input and output optical waveguides is disposed at a determined distance from the mirror reflective surface, to reduce loss of light.