US 12,136,681 B2
Method and apparatus for control and suppression of stray light in a photonic integrated circuit
Liming Wang, Tinley Park, IL (US); and Martin A. Kits van Heyningen, Newport, RI (US)
Assigned to EMCORE Corporation, Alhambra, CA (US)
Filed by EMCORE Corporation, Alhambra, CA (US)
Filed on Oct. 31, 2019, as Appl. No. 16/670,267.
Claims priority of provisional application 62/753,430, filed on Oct. 31, 2018.
Prior Publication US 2020/0135960 A1, Apr. 30, 2020
Int. Cl. G02B 6/122 (2006.01); G01C 19/58 (2006.01); G02B 6/12 (2006.01); H01L 31/12 (2006.01)
CPC H01L 31/12 (2013.01) [G01C 19/58 (2013.01); G02B 6/122 (2013.01); G02B 2006/12126 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A photonic integrated circuit (PIC), comprising:
an integrated optic device disposed on a substrate; and
an integrated optic structure disposed on the substrate around the integrated optic device, the integrated optic structure comprising:
at least one stray light collector comprising a waveguide having a first end and a second end, the first end disposed proximal to the integrated optic device, and the second end coupled to a secondary waveguide that conveys collected stray light to the light damper, the at least one stray light collector having a directionality that is oriented towards non-guided stray light that is sourced by the integrated optic device; and
a light damper configured to receive the non-guided stray light collected by the at least one stray light collector and to mitigate the non-guided stray light.