Patent ID: 11973154
Assignee: WAYMO LLC
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 17:
18. A device comprising:
a substrate;
a photodetector coupled to the substrate; and
a non-linear optical absorber,
wherein the photodetector is arranged to detect light emitted from a light source that irradiates a top surface of the device,
wherein light from the light source that irradiates the top surface of the device is transmitted through the non-linear optical absorber, and
wherein the non-linear optical absorber is configured to reduce intensity of one or more wavelengths of the light emitted from the light source that are at or above a threshold power level, so as to reduce minority carrier photoexcitation in the substrate based on the light emitted from the light source, thereby mitigating dark current arising from minority carriers photoexcited in the substrate based on the light emitted from the light source.