Integrated on-chip polarizer

US10502895B2 · kind B2 · utility

Assignee

• Elenion Technologies, LLC · US

Inventors

• Ruizhi Shi · New York, US
• Thomas Wetteland Baehr-Jones · Arcadia, US
• Yangjin Ma · Brooklyn, US
• Yang Liu · Tangxia, CN
• Michael J. Hochberg · New York, US
• Matthew Akio Streshinsky · New York, US
• Alexandre Horth · New York, US

Key dates

• Filing date: Sep 10, 2018
• Grant date: Dec 10, 2019
• Expiry date: Sep 10, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/12152
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A low loss high extinction ratio on-chip polarizer. The polarizer includes an input waveguide taper having an outer waveguiding region that widens in the direction of light propagation along at least a portion of the taper length, and a core waveguiding region that narrows in the direction of light propagation along at least a portion of the taper length, so as to selectively squeeze out light of undesired modes into the outer regions while preserving light of a desired mode in the waveguide core. An output filter section is provided to prevent light from reentering the output waveguide after being squeezed out. An integrated light absorber/deflector may be coupled to the outer waveguiding regions.