Aeva, Inc.

Brett E Huff

Pradeep Srinivasan

Kevin Kinichi Masuda

Bing Shen

A method of singulating a die of a wafer includes etching a trench on a first surface of a wafer comprising a die and performing a cut on a second surface of the wafer, wherein the cut overlaps with the trench on the first surface of the wafer to separate the die from the wafer.

Techniques for singulating photonics die with optical quality edge

A polarization splitter-rotator (PSR) is described. The PSR having a silicon nitride based waveguide to split and rotate an optical beam. The silicon nitride based waveguide having a first silicon nitride segment including a first layer and a second layer coupled with the first layer.

Polarization splitter-rotator having silicon based waveguide with silicon nitride segment

A method of testing a photonics die at the wafer level includes providing a sacrificial waveguide and a grating coupler at least partially in a scribe line between dies of a wafer, performing one or more tests on the dies of the wafer via the sacrificial waveguide and grating coupler in the scribe line, and removing the sacrificial waveguide during separation of the dies of the wafer.

Techniques for wafer level die testing using sacrificial structures

A LiDAR system includes an optical source to emit an optical beam and a PSR a silicon nitride based waveguide to split and rotate an optical beam. The silicon nitride based waveguide includes a first silicon nitride segment including a first layer and a second layer, the first silicon nitride segment having tapered widths along a longitudinal direction. The second layer includes a first section extending from a first end of the first silicon nitride segment to a converging plane with increasing widths and a second section extending from the converging plane to a second end of the first silicon nitride segment with decreasing widths. The LIDAR system further includes an optical element 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.

Techniques for on-chip polarization management using polarizing waveguides

A light detection and ranging (LiDAR) system according to the present disclosure comprises an optical source to emit an optical beam. The LiDAR system comprises a 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 includes a first silicon nitride segment and a second silicon nitride segment. The first silicon nitride segment includes a first layer and a second layer. The first silicon nitride segment has tapered widths along a longitudinal direction. The second silicon nitride segment includes a silicon nitride adiabatic coupler. The LiDAR system further comprises an optical element to generate a local oscillator (LO) signal and a PD to mix the target return signal with the LO signal to generate a heterodyne signal to extract information of the target.

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Keller, TX, United States of America

Brett E Huff