Patent · US Active

Tunable waveguide grating with a heating layer

US11619785B2 · kind B2 · utility

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20Claims
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Assignee

Inventors

Key dates

Filing dateAug 17, 2021
Grant dateApr 4, 2023
Priority date—
Expiry dateAug 17, 2041

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01S5/1032
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

An optical device including a waveguide grating is disclosed. The optical device may be used as an optical cavity for a laser device, for instance, of an integrated laser device for light detection and ranging (Lidar) applications. In one aspect, the optical device includes a waveguide grating for guiding light, a heating layer provided beneath or above the waveguide grating, and two or more contacts for passing a current through the heating layer, to generate heat in the heating layer. The heating layer is thermally coupled to the waveguide grating and is optically decoupled from the waveguide grating.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.