High-gain high-pressure highly efficient COIL

Marsel V. Zagidullin; Valery D. Nikolaev; Michael I. Svistun; Nikolai A. Khvatov; Gordon D. Hager

doi:10.1117/12.546483

20 September 2004 High-gain high-pressure highly efficient COIL

Marsel V. Zagidullin, Valery D. Nikolaev, Michael I. Svistun, Nikolai A. Khvatov, Gordon D. Hager

Proceedings Volume 5448, High-Power Laser Ablation V; (2004) https://doi.org/10.1117/12.546483
Event: High-Power Laser Ablation, 2004, Taos, New Mexico, United States

Abstract

The activity of development a COIL with high potential recovered pressure, high gain and efficiency is described. Two nozzle banks with conical supersonic nozzles for the driver nitrogen but with different nozzle arrangements have been developed for generation of the gain flow of chemical oxygen-iodine laser. The nozzle banks were supplied by oxygen flow from the cross-flow singlet oxygen generator with filament-guided jets. Results of aerodynamic tests, visualization of flows by laser induced fluorescence, scanning of the excited iodine atoms distribution and laser power extraction are presented. The efficient penetration of the driver buffer flow into the gain flow was observed at distances less than 100 mm from the nozzle banks. The total power exceeding 1 kW with chemical efficiency more than 24% was obtained in 5 cm gain length COIL without helium dilution. The lasing was observed for both nozzle banks at total mirror transmission more than 10%.

Citation Download Citation

Marsel V. Zagidullin, Valery D. Nikolaev, Michael I. Svistun, Nikolai A. Khvatov, and Gordon D. Hager "High-gain high-pressure highly efficient COIL", Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); https://doi.org/10.1117/12.546483

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