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3D parallel pulsed chaos LiDAR system.

Wei Xiong, Qingsong Bai, Yuqi Hu

|April 4, 2024

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We developed a parallel pulsed chaos Light Detection and Ranging (LiDAR) system using chip-scale technology. This advanced LiDAR system offers high peak power, parallelism, and superior anti-interference capabilities for 3D imaging applications.

Area of Science:

Photonics and Optical Engineering
Sensing and Imaging Technologies

Background:

Traditional Light Detection and Ranging (LiDAR) systems face limitations in resolution, speed, and anti-interference capabilities.
Generating high-peak-power pulsed signals for LiDAR applications remains a challenge.

Purpose of the Study:

To propose and experimentally demonstrate a novel parallel pulsed chaos LiDAR system.
To leverage chip-scale silicon nitride microresonators for generating chaotic microcombs.
To enhance LiDAR performance in terms of pixel count, imaging resolution, and anti-jamming.

Main Methods:

Generation of chaotic microcombs using a chip-scale Si3N4 microresonator.
Conversion of continuous-wave chaotic microcombs to pulsed chaotic microcombs via an acousto-optic modulator.

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Implementation of a 4-m 3D imaging experiment utilizing a microelectromechanical mirror for laser scanning.

Main Results:

The parallel pulsed chaos LiDAR system achieved twice the pixel detection rate compared to continuous-wave parallel chaos LiDAR at -6 dBm transmission power.
A high-resolution 11 cm x 10 cm image with 30 x 50 pixels was acquired at 10 dBm transmission power.
The system demonstrated robust anti-jamming capabilities, withstanding interferences up to 15 dB.

Conclusions:

The proposed parallel pulsed chaos LiDAR system offers significant advantages in performance and robustness.
This technology holds promise for advanced 3D imaging and sensing applications requiring high resolution and anti-interference.