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Monolithic coherent LABS lidar based on an integrated transceiver array.

Chao Li, Kan Wu, Xianyi Cao

|June 1, 2022

Summary

This summary is machine-generated.

Researchers developed a novel monolithic frequency-modulated continuous-wave (FMCW) lidar chip using lens-assisted beam steering (LABS). This integrated system enables simultaneous distance and velocity detection on a single chip, advancing lidar technology.

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Area of Science:

Photonics and Optical Engineering
Integrated Optics
Sensing Technology

Background:

Traditional lidar systems often require bulky components and complex assembly.
Miniaturization and integration are key challenges in developing advanced sensing solutions.
Frequency-modulated continuous-wave (FMCW) lidar offers advantages in simultaneous distance and velocity measurement.

Purpose of the Study:

To demonstrate a monolithic FMCW lidar chip with integrated beam steering capabilities.
To enable simultaneous distance and velocity detection on a single chip.
To showcase the potential of lens-assisted beam steering (LABS) technology in lidar systems.

Main Methods:

Fabrication of a monolithic chip featuring a 2x2 switchable transceiver array.
Integration of a Bragg grating and U-shaped photodetector (PD) within each transceiver.
Implementation of lens-assisted beam steering (LABS) for beam control.
Utilizing FMCW principles for coherent detection.

Main Results:

Successful demonstration of a monolithic coherent LABS lidar system.
Achieved a scanning angle of 2.86° with a scanning speed of 5.3 µs.
Demonstrated ranging capability up to 5 meters.
Achieved velocity detection accuracy of 0.45 m/s.

Conclusions:

The developed monolithic FMCW lidar chip with LABS technology successfully integrates essential lidar functions onto a single chip.
This integrated approach enables efficient, simultaneous distance and velocity measurements.
The technology shows significant promise for compact and high-performance lidar applications.