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Proceedings Paper

Pulsed DF Laser Performance: Model And Measurements
Author(s): Raymond L. Taylor; Michael F. Weisbach; J. Doyle McClure
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Paper Abstract

A theoretical model of the photolytically initiated, pulsed DF chemical laser medium has been developed and validated against experimental data obtained on the PHOCL-50 laser device. The model employs a finite rate kinetic mechanism with all the relevant chemistry and vibrational energy transfer processes. A major assumption of the model is the use of rotational equilibrium. However, this approximation is considered adequate for the operating pressure range of the laser, near atmospheric. The PHOCL-50 data base provides a wide range of well documented experimental parameters, including the first simultaneous determination of laser pulse energy and initiation strength. The model predicts with good accuracy the experimental laser performance for a wide range of variations in mixture stoichiometry, initiation strength, added 02, and initial DF due to prereaction. An interesting area of disagreement concerns the inability of the theory to predict the laser pulse shape. This disagreement appears to be due to the details of the chemistry in the higher vibrational levels of DF. The present model has been successfully used to develop scaling algorithms and in the design of laser devices.

Paper Details

Date Published: 15 September 1981
PDF: 10 pages
Proc. SPIE 0270, High Power Lasers and Applications, (15 September 1981); doi: 10.1117/12.931752
Show Author Affiliations
Raymond L. Taylor, Research and Laser Technology, Inc. (United States)
Michael F. Weisbach, Boeing Aerospace Company (United States)
J. Doyle McClure, Boeing Aerospace Company (United States)

Published in SPIE Proceedings Vol. 0270:
High Power Lasers and Applications
Charles C. Tang, Editor(s)

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