Multi-channel electro-optic receiver with polarization diversity and timing-skew management

US11709319B2 · kind B2 · utility

Assignee

• Ayar Labs, Inc. · US

Inventors

• Pavan Bhargava · Emeryville, US
• Derek Van Orden · San Francisco, US
• Mark Wade · Berkeley, US
• John Fini · Metuchen, US
• Chen Sun · Berkeley, US
• Milos Popovic · Somerville, US
• Anatol Khilo · Lexington, US

Key dates

• Filing date: Jun 21, 2021
• Grant date: Jul 25, 2023
• Expiry date: Jun 21, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B6/34
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An electro-optic receiver includes a polarization splitter and rotator (PSR) that directs incoming light having a first polarization through a first end of an optical waveguide, and that rotates incoming light from a second polarization to the first polarization to create polarization-rotated light that is directed to a second end of the optical waveguide. The incoming light of the first polarization and the polarization-rotated light travel through the optical waveguide in opposite directions. A plurality of ring resonators is optically coupled the optical waveguide. Each ring resonator is configured to operate at a respective resonant wavelength, such that the incoming light of the first polarization having the respective resonant wavelength optically couples into said ring resonator in a first propagation direction, and such that the polarization-rotated light having the respective resonant wavelength optically couples into said ring resonator in a second propagation direction opposite the first propagation direction.