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Multi-target two-photon dual-comb LiDAR.

Hollie Wright, Alexander J M Nelmes, Nick J Weston

|July 21, 2023

Summary

This summary is machine-generated.

This study introduces two-photon dual-comb LiDAR for precise distance measurements. This advanced LiDAR technology enables real-time ranging to multiple targets with exceptional accuracy using a single detector.

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Area of Science:

Optics and Photonics
LiDAR Technology
Metrology

Background:

Dual-comb LiDAR typically uses complex interferometric acquisition.
Conventional methods require sophisticated optical setups for ranging.
Efficient and precise distance measurement remains a key challenge in various applications.

Purpose of the Study:

To apply two-photon dual-comb LiDAR for real-time, absolute distance measurements.
To demonstrate the system's capability for multi-target and dynamic ranging.
To achieve high-precision angular measurements using the developed LiDAR system.

Main Methods:

Substitution of two-photon cross-correlation for conventional coherent gating in dual-comb ranging.
Utilizing a single silicon-photodiode detector for data acquisition.
Implementing real-time signal processing for distance and angle calculations.

Main Results:

Achieved distance precisions of 197-255 nm for static targets with 2-second averaging.
Demonstrated simultaneous real-time ranging to three dynamic targets with varied waveforms.
Obtained pitch and yaw angular measurements with 27.1 arcsec precision on a 25 mm baseline.

Conclusions:

Two-photon dual-comb LiDAR offers a simplified and highly accurate ranging solution.
The system enables robust real-time multi-target distance and angular measurements.
This technology has potential applications in precision metrology and autonomous systems.