US 12,189,200 B2
Tapered waveguide semiconductor optical devices with increased facet reflectivity
Wolfgang Parz, Ithaca, NY (US); and Meng Wang, Ithaca, NY (US)
Assigned to MACOM Technology Solutions Holdings, Inc., Lowell, MA (US)
Filed by MACOM Technology Solutions Holdings, Inc., Lowell, MA (US)
Filed on Feb. 21, 2022, as Appl. No. 17/676,674.
Prior Publication US 2023/0266548 A1, Aug. 24, 2023
Int. Cl. G02B 6/42 (2006.01); F21V 8/00 (2006.01); G02B 6/43 (2006.01)
CPC G02B 6/4295 (2013.01) [G02B 6/0046 (2013.01); G02B 6/4296 (2013.01); G02B 6/43 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A semiconductor optical device, comprising:
a first facet bounding a first end of the semiconductor optical device; and
a waveguide having a first end proximate the first facet, the first end of the waveguide being tapered towards the first facet, wherein the first facet has a curvature to increase modal reflectivity at a first interface at which the first end of the waveguide meets the first facet;
wherein the curvature of the first facet is one of a cylindrical shape having a constant radius or a non-cylindrical shape having a non-constant radius.