Patent ID: 11885974
Assignee: META PLATFORMS TECHNOLOGIES, LLC
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 0:
1. A device, comprising:
a waveguide configured to output a first light having a first polarization to a first side of the waveguide and a second light having the first polarization to a second side of the waveguide;
an optical element assembly disposed at the first side of the waveguide and configured to convert the first light having the first polarization into a third light having a second polarization, and output the third light toward the waveguide; and
a polarizer disposed at the second side of the waveguide and configured to transmit the third light having the second polarization, and block the second light having the first polarization,
wherein the optical element assembly comprises a reflector, and a phase-modulator disposed between the waveguide and the reflector, and
wherein the reflector is configured to provide an optical power that is variable.