Patent ID: 11881677
Assignee: DENSO CORPORATION
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 8:
9. The laser light source according to claim 8,
wherein the resonance circuit further comprises:
a directional coupler configured to branch the first waveguide into two branched waveguides being a first branched waveguide and a second branched waveguide, the ring resonator being arranged between (i) the first branched waveguide of the first waveguide branched by the directional coupler and (ii) the second waveguide,

wherein the light reflected from the first reflector is blocked from the ring resonator and partially outputted from a first end of the first branched waveguide of the first waveguide opposite to a second end of the first branched waveguide connected to the light emitter and the first reflector,
wherein the light reflected from the second reflector is blocked from the ring resonator and partially outputted from the first end of the second waveguide opposite to the second end of the second waveguide connected to the second reflector,
wherein the light reflected from the first reflector is inputted to the second branched waveguide of the first waveguide and transmitted to an end of the second branched waveguide of the first waveguide,
wherein in the optical negative feedback circuit, the third waveguide is arranged such that the light transmitted to the end of the second branched waveguide of the first waveguide is inputted to the third waveguide,
wherein the light reflected from the third reflector is outputted from the third waveguide and inputted to the first waveguide.