US 11,688,995 B2
Grating emitter systems with controlled polarization
Steven J. Spector, Lexington, MA (US); Steven J. Byrnes, Watertown, MA (US); and Robert Lutwak, Marblehead, MA (US)
Assigned to The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US)
Filed by The Charles Stark Draper Laboratory, Inc., Cambridge, MA (US)
Filed on Oct. 21, 2020, as Appl. No. 17/76,149.
Claims priority of provisional application 62/923,926, filed on Oct. 21, 2019.
Prior Publication US 2021/0119410 A1, Apr. 22, 2021
Int. Cl. H01S 5/026 (2006.01); H01S 5/10 (2021.01); H01S 5/062 (2006.01)
CPC H01S 5/0268 (2013.01) [H01S 5/06236 (2013.01); H01S 5/1003 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for modulating polarization of an optical beam, the system comprising:
a light source for generating light into a first waveguide and a second waveguide;
a first grating coupler for coupling the light from the first waveguide into an output emission;
a second grating coupler for coupling the light from the second waveguide into the output emission; and
at least one phase shifter for shifting the phase of the light between the first waveguide and the second waveguide in order to control a polarization of the output emission.