US 12,222,257 B2
Optical receiver photodiode testing using test optical terminal at different location than operational optical terminal
Hanyi Ding, Colchester, VT (US); Aidong Yan, San Jose, CA (US); and Rongtao Cao, Essex Junction, VT (US)
Assigned to GlobalFoundries U.S. Inc., Malta, NY (US)
Filed by GlobalFoundries U.S. Inc., Malta, NY (US)
Filed on Mar. 30, 2022, as Appl. No. 17/657,175.
Prior Publication US 2023/0314274 A1, Oct. 5, 2023
Int. Cl. G01M 11/00 (2006.01); G02B 6/42 (2006.01)
CPC G01M 11/00 (2013.01) [G02B 6/4206 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A structure, comprising:
a photodiode on a substrate, the photodiode including a first optical terminal and a second, test optical terminal, the second, test optical terminal in a different location than the first optical terminal of the photodiode;
an optical component in optical communication with the first optical terminal of the photodiode; and
a grating coupler in optical communication with and coupled to the second, test optical terminal of the photodiode,
wherein the optical component is in optical communication with the first optical terminal of the photodiode via a first optical signal path, and the grating coupler is in optical communication with the second, test optical terminal of the photodiode via a second optical signal path separate from the first optical signal path.