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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

A universal 3D imaging sensor on a silicon photonics platform.

Christopher Rogers¹, Alexander Y Piggott¹, David J Thomson²

¹Pointcloud Inc, San Francisco, CA, USA.

|February 11, 2021

Summary

This summary is machine-generated.

Researchers developed a 512-pixel coherent detector array for universal 3D imaging. This new system offers high depth accuracy and direct velocity measurement, overcoming previous pixel limitations for advanced machine perception.

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Area of Science:

Optics and Photonics
Computer Vision and Machine Perception
Solid-State Electronics

Background:

Accurate 3D imaging is crucial for machines to interact with the physical world, but current technologies have limitations.
Existing 3D imaging systems lack the broad applicability and impact of 2D digital image sensors.
Previous large-scale coherent detector arrays were limited by electrical and photonic connection challenges, restricting them to fewer than 20 pixels.

Purpose of the Study:

To demonstrate a large-scale coherent detector array for universal 3D imaging.
To overcome the limitations of previous 3D imaging systems by enabling scalable, high-performance arrays.
To achieve high depth accuracy and direct velocity measurement in a compact, low-power system.

Main Methods:

Developed a 512-pixel coherent detector array using monolithic integration of photonic and electronic circuits.
Implemented an optical heterodyne detection scheme with an integrated electronic readout architecture.
Utilized two-axis solid-state beam steering for flexible field of view and range management.

Main Results:

Demonstrated a large-scale coherent detector array (512 pixels) for 3D imaging.
Achieved 3.1 mm accuracy at 75 meters using only 4 mW of light, operating at the quantum noise limit.
The system is an order of magnitude more accurate than existing solid-state systems at similar ranges.

Conclusions:

The developed system overcomes previous scalability issues in coherent detector arrays.
This technology enables the development of low-cost, compact, high-performance 3D imaging cameras.
Potential applications include robotics, autonomous navigation, augmented reality, and healthcare.