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Related Experiment Video

Updated: Jun 28, 2026

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
09:38

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

All semiconductor laser Doppler anemometer at 1.55 microm.

René Skov Hansen1, Christian Pedersen

  • 1Institute of Sensors, Signals and Electrotechnics, University of Southern Denmark, Odense M, Denmark. rsh@sense.sdu.dk

Optics Express
|October 30, 2008
PubMed
Summary

Researchers developed the first all-semiconductor Laser Doppler Anemometer (LIDAR) for wind speed measurement. This innovative system demonstrates reliable performance for atmospheric wind velocity determination.

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Last Updated: Jun 28, 2026

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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Published on: April 24, 2014

Area of Science:

  • Atmospheric physics
  • Optical instrumentation
  • Laser technology

Background:

  • Traditional Laser Doppler Anemometers (LIDAR) often require complex and bulky laser sources.
  • Achieving the necessary output power and coherence from semiconductor lasers for LIDAR applications has been a significant challenge.

Purpose of the Study:

  • To introduce the first all-semiconductor Laser Doppler Anemometer (LIDAR) for wind speed determination.
  • To present the design and experimental validation of a novel coherent continuous-wave (cw) laser Doppler anemometer.
  • To demonstrate the feasibility of using all-semiconductor lasers for atmospheric wind velocity measurements.

Main Methods:

  • Design and construction of a focusing coherent cw laser Doppler anemometer utilizing an all-semiconductor laser source.
  • Experimental testing of the system for measuring atmospheric wind velocities within a 10 to 300-meter range.
  • Evaluation of laser output power and coherence properties critical for LIDAR performance.

Main Results:

  • Successful demonstration of an all-semiconductor laser meeting the power and coherence requirements for LIDAR.
  • Preliminary tests at a 40-meter distance yielded a signal-to-noise ratio of 9 dB.
  • Achieved an update rate of 12 Hz under clear-day atmospheric conditions.

Conclusions:

  • All-semiconductor lasers are suitable for constructing effective Laser Doppler Anemometers (LIDAR).
  • The developed system shows promise for accurate atmospheric wind velocity measurements.
  • This technology advances the development of compact and potentially more affordable wind sensing systems.