Propagation of a laser beam through vapor media

Anurup Gohain Barua; Gauranga Dhar Baruah

doi:10.1117/12.479201

30 April 2003 Propagation of a laser beam through vapor media

Anurup Gohain Barua, Gauranga Dhar Baruah

Proceedings Volume 4976, Atmospheric Propagation; (2003) https://doi.org/10.1117/12.479201
Event: High-Power Lasers and Applications, 2003, San Jose, CA, United States

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.

Citation Download Citation

Anurup Gohain Barua and Gauranga Dhar Baruah "Propagation of a laser beam through vapor media", Proc. SPIE 4976, Atmospheric Propagation, (30 April 2003); https://doi.org/10.1117/12.479201

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