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Characterization and mitigation of electronic crosstalk on InGaAs PIN 3D flash LiDAR imagers
Optics Express
|October 7, 2021
Summary
This study simplifies 3D flash LiDAR calibration by characterizing and mitigating electronic crosstalk. New methods reduce noise, improving imaging performance for InGaAs PIN photodiode sensors.
Area of Science:
- Optoelectronics
- Sensor Technology
- Photonics
Background:
- 3D flash LiDAR imagers utilize time-to-digital converters (TDCs) for time-of-flight measurements.
- High bus loading events, especially with simultaneous detector triggers, cause electronic crosstalk in TDCs.
- Simultaneous Ranging Crosstalk Noise (SRCN) limits full-frame imaging in LiDAR systems.
Purpose of the Study:
- To characterize and mitigate electronic crosstalk in InGaAs PIN photodiode 3D flash LiDAR imagers.
- To simplify and enhance the calibration system design for LiDAR sensors.
- To overcome limitations imposed by SRCN on full-frame imaging.
Main Methods:
- Characterization of electronic crosstalk using a physical checkerboard target.
- Mitigation of crosstalk through a novel approach involving a spatial light modulator and direct illumination.
- Development of a more compact system design for LiDAR calibration.
Main Results:
- Effective characterization of electronic crosstalk patterns in 3D flash LiDAR systems.
- Successful mitigation of SRCN, enabling improved full-frame imaging capabilities.
- Demonstration of a simplified and more efficient calibration process.
Conclusions:
- The proposed methods significantly improve the calibration of 3D flash LiDAR imagers.
- The new approach leads to a more compact and robust sensor design.
- This research advances the performance and applicability of LiDAR imaging technology.
