Open AccessAll semiconductor laser Doppler anemometer at 155 μm
Author(s) -
René Skov Hansen,
Christian Pedersen
Publication year - 2008
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.018288
Subject(s) - anemometer , doppler effect , optics , lidar , laser , coherence (philosophical gambling strategy) , laser doppler velocimetry , semiconductor laser theory , wind speed , laser doppler vibrometer , coherence length , semiconductor , physics , signal (programming language) , coherence time , remote sensing , laser power scaling , environmental science , materials science , meteorology , optoelectronics , geology , computer science , medicine , blood flow , superconductivity , quantum mechanics , astronomy , programming language
We report to our best knowledge the first all semiconductor Laser Doppler Anemometer (LIDAR) for wind speed determination. We will present the design and first experimental results on a focusing coherent cw laser Doppler anemometer for measuring atmospheric wind velocities in the 10 meters to 300 meters distance range. Especially, we will demonstrate that both the output power as well as the demanding coherence properties required from the laser source can be accomplished by an all semiconductor laser. Preliminary tests at a distance of 40 meters indicate a typical signal to noise ratio of 9 dB. This result is obtained at a clear day with an up-date rate of 12 Hz.