Patent ID: 9151890
Filing Date: 2015-10-06
Classification: G02B,H01S,Y10T

Abstract:
1. An optical apparatus comprising: a waveguide substrate; one or more optical waveguide layers on the substrate; source, primary, and secondary optical waveguides formed in one or more of the optical waveguide layers, each of the optical waveguides being arranged to substantially confine in two transverse dimensions a corresponding guided optical mode; a light source that emits an optical signal and is arranged to launch a portion of the optical signal to propagate along the source waveguide as a source optical signal in the corresponding guided optical mode; a first optical waveguide tap formed in one or more of the optical waveguide layers and arranged to direct a primary fraction of the source optical signal to propagate along the primary waveguide as a primary optical signal and to direct a secondary fraction of the source optical signal to propagate along the secondary waveguide as a secondary optical signal; and an optically absorptive encapsulant that substantially covers one or more edges of the waveguide layers at the edge of the waveguide substrate, wherein the secondary waveguide is arranged so that the secondary optical signal propagates to an end of the secondary waveguide and emerges from transmissive lateral surfaces of the optical waveguide layers at the edge of the waveguide substrate.