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Proceedings Paper

Propagation of a laser beam through vapor media
Author(s): Anurup Gohain Barua; Gauranga Dhar Baruah
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Paper Abstract

One of the elementary models of molecular band absorption is the quasi-random model. This model is used to study the propagation of a laser beam through vapor media. 1.15μm is one of the many helium-neon lasers operating in the near-IR region; in this region water vapor molecules have five absorption lines. Absorption of this laser beam in a cloud of water vapor, in the frequency interval 8676-8680 cm-1, is shown in intervals 0.2 cm-2 wide for two different path lengths. Interaction of a tunable dye laser beam with p-benzoquinone-D4 lines is studied in the frequecny range 20750-22275 cm-1. Values of transmittance, averaged over intervals of 25 cm-1, are obtained for two different absorber thicknesses. From these values, intensities of the absorption lines are simulated.

Paper Details

Date Published: 30 April 2003
PDF: 4 pages
Proc. SPIE 4976, Atmospheric Propagation, (30 April 2003); doi: 10.1117/12.479201
Show Author Affiliations
Anurup Gohain Barua, Gauhati Univ. (India)
Gauranga Dhar Baruah, Dibrugarh Univ. (India)

Published in SPIE Proceedings Vol. 4976:
Atmospheric Propagation
Cynthia Y. Young; John S. Stryjewski, Editor(s)

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