US 11,815,721 B2
Photonic integrated circuit having redundant light path and method of using
Weiwei Song, Hsinchu (TW); and Stefan Rusu, Hsinchu (TW)
Assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW)
Filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW)
Filed on Jul. 27, 2021, as Appl. No. 17/443,704.
Claims priority of provisional application 63/187,554, filed on May 12, 2021.
Prior Publication US 2022/0365284 A1, Nov. 17, 2022
Int. Cl. G02B 6/293 (2006.01); G02B 6/42 (2006.01)
CPC G02B 6/29395 (2013.01) [G02B 6/2935 (2013.01); G02B 6/2938 (2013.01); G02B 6/29338 (2013.01); G02B 6/4215 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An integrated circuit comprising:
an electronic circuit; and
a photonic device, wherein the photonic device comprises:
a first photodetector (PD) electrically connected to the electronic circuit;
a second PD electrically connected to the electronic circuit;
a first waveguide configured to receive an optical signal input, wherein the first waveguide is optically connected to the first PD;
a second waveguide optically connected to the second PD; and
a resonant structure between the first waveguide and the second waveguide, wherein the resonant structure is configured to optically couple the first waveguide to the second waveguide.