Patent ID: 11955773
Assignee: FORSCHUNGSVERBUND BERLIN E.V.
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 0:
1. A laser device, comprising:
a substrate, comprising a first surface;
a passive circular optical waveguide, comprising an unstructured surface and a second surface that is opposite to the unstructured surface, wherein the second surface is arranged on the first surface;
a photonic crystal, comprising active sections, arranged on the unstructured surface;
a coupling section, arranged adjacent to the waveguide for coupling out laser light;
wherein the photonic crystal comprises a plurality of semiconductor elements that include the active sections, said elements have at least one of a pillar-shape and a wall-shape and are arranged periodically around the perimeter of the waveguide, such that the photonic crystal does not extend into the waveguide;
wherein the waveguide and the photonic crystal together form a closed optical resonator, such that at least one resonator mode forms a standing wave in the resonator;
wherein the photonic crystal is configured for optical interaction with the at least one resonator mode for generation and/or amplification of laser light at a wavelength of the at least one resonator mode;
wherein the closed optical resonator is a ring resonator or a racetrack resonator, composed of straight and curved sections.