US 12,078,845 B2
Optical system
Feng-Wei Kuo, Hsinchu County (TW); Chewn-Pu Jou, Hsinchu (TW); Cheng-Tse Tang, Hsinchu (TW); and Hung-Yi Kuo, Taipei (TW)
Assigned to Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed on Mar. 3, 2023, as Appl. No. 18/177,771.
Application 18/177,771 is a division of application No. 17/140,134, filed on Jan. 4, 2021, granted, now 11,640,033.
Prior Publication US 2023/0204862 A1, Jun. 29, 2023
Int. Cl. G02B 6/30 (2006.01)
CPC G02B 6/305 (2013.01) 20 Claims
OG exemplary drawing
 
1. An optical system, comprising:
an optical source;
an optical fiber receiving and transmitting an optical signal from the optical source; and
an optical coupler receiving the optical signal from the optical fiber, the optical coupler comprising:
a first waveguide comprising a first coupling portion having a first taper part; and
a second waveguide disposed on the first waveguide, the second waveguide comprising a second coupling portion having a second taper part, the second taper part being disposed on and optically coupled with the first taper part,
wherein a thickness of the first waveguide is larger than a thickness of the second waveguide.