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Proceedings Paper

Parametric study of the Ben-Gurion University efficient chemical oxygen-iodine laser
Author(s): Boris D. Barmashenko; Victor Rybalkin; Arje Katz; Salman Rosenwaks
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Paper Abstract

We report on a detailed parametric study of an extremely efficient supersonic chemical oxygen-iodine laser (COIL) with supersonic mixing of iodine and oxygen. Output power exceeding 0.5 kW with chemical efficiency of ~33% was obtained in a 5 cm gain length for Cl2 flow rate of 17 mmole/s. 33% efficiency is the highest reported chemical efficiency of any supersonic COIL. Comparison between different mixing schemes shows that for supersonic mixing the output power and chemical efficiency are about 20% higher than for transonic mixing scheme. The optimal conditions for the efficient operation are investigated. Diagnostic measurements of the small-signal gain shows that the value of the gain for the supersonic mixing scheme corresponding to the maximum efficiency is about 0.75%/cm, about 1.5 times larger than for transonic mixing scheme. Studies of different supersonic mixing schemes show that to achieve further power increase the injection location should be moved downstream.

Paper Details

Date Published: 20 September 2004
PDF: 12 pages
Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); doi: 10.1117/12.548150
Show Author Affiliations
Boris D. Barmashenko, Ben-Gurion Univ. of the Negev (Israel)
Victor Rybalkin, Ben-Gurion Univ. of the Negev (Israel)
Arje Katz, Ben-Gurion Univ. of the Negev (Israel)
Salman Rosenwaks, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 5448:
High-Power Laser Ablation V
Claude R. Phipps, Editor(s)

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