Optical interposer with ninety degree light bending

摘要

An optical interposer comprising: (a) a crystalline substrate having a top planar surface and a crystalline plane angle; (b) a groove defined in the top planar surface and extending from an edge of the substrate to a terminal end, the groove having side walls and a first facet at the terminal end, the facet having a first angle relative to the top planar surface, the first angle being about the crystalline plane angle, the first angle having a delta from 45°; (c) a reflective coating on the first facet; and (d) an optical conduit having an optical axis and an end face optically coupled with the first facet, the end face having a second angle with respect to the optical axis such that the angle of refraction at the end face compensates for the delta such that the end face and the first facet cooperate to bend light about 90°.

主权项

1. An optical interposer comprising:
a crystalline substrate having a top planar surface and a crystalline plane angle; a plurality of grooves defined in said top planar surface and extending from an edge of said substrate to a terminal end, each of said plurality of grooves having side walls and a first facet at said terminal end perpendicular to said side walls, said first facet having a first angle relative to said top planar surface, said first angle being about said crystalline plane angle, said first facet running across each of said plurality of grooves, said first angle having a delta from a 45° angle, wherein said substrate is silicon and said first angle is 54.7°; a reflective coating on said first facet; an optical conduit having an optical axis and an end face having a second angle with respect to said optical axis, said second angle being non-perpendicular to said optical axis such that the angle of refraction at said end face compensates for said delta such that said end face and said first facet cooperate to bend light about 90°; wherein said end face and said first facet define a space therebetween, wherein said space is an air gap and said second angle is 123.1°.