Patent ID: 11940572
Assignee: AEVA, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A light detection and ranging (LiDAR) system, comprising:
an optical source to emit an optical beam;
a polarization splitter-rotator (PSR) comprising a silicon nitride based waveguide to split and rotate a target return signal of the optical beam from a target, the silicon nitride based waveguide comprising a first silicon nitride segment, the first silicon nitride segment comprising a first silicon nitride layer and a second silicon nitride layer, wherein a ratio of a width of the first silicon nitride layer to a width of the second silicon nitride layer at a converging plane is between 30% to 60%;
an optical element, operatively coupled with the PSR, to generate a local oscillator (LO) signal; and
an optical detector to mix the target return signal with the LO signal to generate a heterodyne signal to extract range and velocity information of the target.