Patent ID: 11870216
Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 0:
1. An on-chip laser, comprising:
a gain portion;
a mirror in communication with the gain portion;
a waveguide in communication with the gain portion; and
a resonator optically coupled to the waveguide via only one optical coupling, wherein the waveguide and the resonator are separate from the gain portion, wherein the waveguide is in a pass-by configuration with the resonator such that the optical coupling has only a single optical coupling region between the waveguide and the resonator, wherein the resonator comprises a non-DBR resonator and wherein the waveguide, the resonator, and the optical coupling are collectively configured so that the resonator outputs a first portion of laser light and reflects a second portion of laser light back to the gain portion through the waveguide, the amount of the second portion of laser light reflected sufficient for the resonator to act as an output mirror of the on-chip laser, and collectively configured for operation close to critical coupling wherein the single optical coupling region exhibits low coupling κ.