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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Published on: April 1, 2020

Frequency-angular resolving LiDAR using chip-scale acousto-optic beam steering.

Bingzhao Li¹, Qixuan Lin¹, Mo Li^2,3

¹Department of Electrical and Computer Engineering, University of Washington, Seattle, WA, USA.

|June 28, 2023

Summary

This summary is machine-generated.

A new on-chip, acousto-optic beam-steering technique uses a single transducer for light detection and ranging (LiDAR) systems. This innovation enables miniature, low-cost LiDAR for autonomous vehicles and robotics.

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Area of Science:

Photonics and Optical Engineering
Robotics and Automation
Materials Science

Background:

Light detection and ranging (LiDAR) is crucial for intelligent automation, but requires non-mechanical beam-steering.
Existing beam-steering technologies are often bulky, fragile, and expensive.
Next-generation LiDAR demands compact, robust, and cost-effective solutions.

Purpose of the Study:

To develop a novel on-chip, acousto-optic beam-steering technique for LiDAR.
To demonstrate a frequency-angular resolving LiDAR system using Brillouin scattering.
To enable miniature, low-cost LiDAR for widespread adoption in automation.

Main Methods:

Utilized a single gigahertz acoustic transducer for free-space beam steering.
Exploited Brillouin scattering to achieve frequency-angular resolution.
Implemented frequency-modulated continuous-wave ranging with a novel detection scheme.

Main Results:

Achieved an 18° field of view and 0.12° angular resolution.
Demonstrated ranging distances up to 115 meters.
Showcased a simple device construction and control system.

Conclusions:

The acousto-optic beam-steering technique offers a scalable solution for LiDAR.
This technology paves the way for miniature, low-cost LiDAR systems.
The developed LiDAR system advances automation, navigation, and robotics applications.