EFFECTS OF WIND ON THERMAL DEFOCUSING OF CO2LASER RADIATION
作者:
Frederick G. Gebhardt,
David C. Smith,
期刊:
Applied Physics Letters
(AIP Available online 1969)
卷期:
Volume 14,
issue 2
页码: 52-54
ISSN:0003-6951
年代: 1969
DOI:10.1063/1.1652708
出版商: AIP
数据来源: AIP
摘要:
A cw laser beam propagating in an absorbing medium may be spread, distorted, or deflected as a result of thermally self‐induced refractive index gradients. In this paper the results of an experiment are reported where a wind, transverse to the direction of propagation of a CO2laser beam, is imposed on an absorbing medium consisting of a mixture of air and propane. The experimental results show, in agreement with a simplified theoretical model, that the effect of the wind is (1) to deflect the laser beam into the wind for a certain range of wind velocities and (2) to reduce the thermal defocusing or blooming which results from the processes of thermal conduction and natural convection.
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