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Proceedings Paper

Two-dimensional source flow gain model for the chemical oxygen-iodine laser
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Paper Abstract

A source flow gain model for optical extraction from the chemical oxygen-iodine laser medium is presented. In this model the gas dynamics of the reactive flow through the optical cavity, transverse to the optical axis, is described by the two-dimensional boundary-layer approximation to the full Navier-Stokes equations. The appropriate mass continuity, species, momentum, and energy conservation equations in cylindrical polar coordinates are presented and discussed. The gas kinetics are described by a reduced set of fourteen reactions among nine chemical species and includes pumping of the upper laser level by O2(1(Delta) ), deactivation by water and energy pooling with O2(1(Delta) ), and the Heidner molecular I2 dissociation mechanism. Stimulated emission on the 3 YLD 4 hyperfine transition of atomic iodine is described by a generalized version of the Zagidullian gain model which includes finite hyperfine relaxation of the 2P1/2 and 2P3/2 iodine sublevels, velocity cross-relaxation of the iodine atoms, and allows for incomplete I2 dissociation. The model is illustrated by application to a laboratory-sized device and the effects of the boundary layer upon the gas flow, I2 dissociation, O2(1(Delta) ) fraction, small signal gain, optical extraction, and the medium homogeneity are examined.

Paper Details

Date Published: 2 May 1997
PDF: 19 pages
Proc. SPIE 2989, Modeling and Simulation of Higher-Power Laser Systems IV, (2 May 1997); doi: 10.1117/12.273661
Show Author Affiliations
Drew A. Copeland, Rocketdyne Div. of Boeing North American, Inc. (United States)
Tientsai T. Yang, Rocketdyne Div. of Boeing North American, Inc. (United States)

Published in SPIE Proceedings Vol. 2989:
Modeling and Simulation of Higher-Power Laser Systems IV
Usamah O. Farrukh; Santanu Basu, Editor(s)

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