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Related Experiment Videos

Lidar detection using a dual-frequency source.

Rosemary Diaz1, Sze-Chun Chan, Jia-Ming Liu

  • 1Electrical Engineering Department, University of California, Los Angeles, California 90095-1594, USA. rdiaz@ee.ucla.edu

Optics Letters
|November 30, 2006
PubMed
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A novel dual-frequency Doppler-lidar technique accurately measures minute velocities down to 26 µm/s. This advancement utilizes a tunable, coherently locked laser source, enhancing precision in fluid dynamics and material science research.

Area of Science:

  • Physics
  • Optical Engineering
  • Laser Technology

Background:

  • Doppler-lidar is a crucial remote sensing technique for velocity measurement.
  • Existing methods face limitations in measuring very low velocities with high accuracy.

Purpose of the Study:

  • To investigate a new dual-frequency Doppler-lidar measurement technique.
  • To demonstrate the capability of measuring velocities as small as 26 µm/s.

Main Methods:

  • Utilizing a coherently locked, tunable, dual-frequency laser source.
  • Exploiting nonlinear dynamics of a semiconductor laser via optical injection and controlled operating conditions.

Main Results:

  • Accurate measurement of velocities as low as 26 µm/s was achieved.

Related Experiment Videos

  • The technique demonstrates high sensitivity and precision.

    • Conclusions:

    • The developed dual-frequency Doppler-lidar technique offers unprecedented accuracy for low-velocity measurements.
    • This method has potential applications in various scientific and industrial fields requiring precise velocity sensing.