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Dual-Frequency Doppler LiDAR Based on External Optical Feedback Effect in a Laser.

Zhuqiu Chen1, Yanguang Yu1, Yuxi Ruan1

  • 1School of Electrical, Computer and Telecommunications Engineering, University of Wollongong, Northfields Avenue, Wollongong 2522, NSW, Australia.

Sensors (Basel, Switzerland)
|November 10, 2020
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Summary

A new Dual-frequency Doppler LiDAR uses external optical feedback in a laser diode to create a dual-frequency light source. This cost-effective system offers high-resolution velocity measurements for practical Light Detection And Ranging applications.

Keywords:
doppler LiDARdual-frequency laserlaser dynamicsoptical feedbackvelocity measurement

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Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Remote Sensing Technology

Background:

  • Development of novel Light Detection And Ranging (LiDAR) systems is crucial for advancing remote sensing capabilities.
  • Existing Doppler LiDAR systems often involve complex and costly optical setups.
  • The external optical feedback (EOF) effect in laser diodes (LDs) presents an opportunity for simplified light source generation.

Discussion:

  • This study introduces a novel Dual-frequency Doppler LiDAR (DFDL) system.
  • The dual-frequency light source is achieved by exploiting the external optical feedback (EOF) effect in a laser diode (LD) operating in the period-one (P1) state.
  • This approach minimizes component count, reduces implementation costs, and simplifies optical alignment.

Key Insights:

  • A cost-effective and simplified dual-frequency light source is demonstrated for Doppler LiDAR.
  • The system achieves high measurement resolution for velocity determination.
  • The proposed DFDL design leverages specific laser diode operating parameters and the EOF effect.

Outlook:

  • The presented DFDL technology holds significant potential for practical engineering applications in remote sensing.
  • Further research could explore optimizing LD parameters for enhanced performance and broader applicability.
  • This innovation could lead to more accessible and efficient velocity measurement solutions using LiDAR.