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Proceedings Paper

Laser doppler device for air pollution detection
Author(s): Hiie Hindrikus; Kalju Meigas
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Paper Abstract

A simple device for small particles detection is presented, consisting of a single-mode diode or gas laser with external cavity. The basis of the measurement is the selfmixing that occurs in the laser active medium when the radiation, scattered back by the moving particle into the laser resonator, interferes with the field inside it and causes changes of a pump current. Information about the number, velocity and size of particles can be derived by processing the current pulses. This compact device is capable of detecting a single microndiameter particle movement.

Paper Details

Date Published: 23 September 1994
PDF: 10 pages
Proc. SPIE 2271, Industrial Applications of Laser Radar, (23 September 1994); doi: 10.1117/12.188151
Show Author Affiliations
Hiie Hindrikus, Tallinn Technical Univ. (Estonia)
Kalju Meigas, Tallinn Technical Univ. (Estonia)

Published in SPIE Proceedings Vol. 2271:
Industrial Applications of Laser Radar
Gary W. Kamerman; William E. Keicher, Editor(s)

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