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Proceedings Paper

Resonators for high brightness COIL
Author(s): Karin M. Gruenewald
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Paper Abstract

High brightness performance of chemical oxygen iodine lasers (COIL) requires resonator concepts that enable efficient power extraction from low gain medium while the beam quality is close to the diffraction limit. The resonator shall provide straightforward alignment procedures and stable output performance for efficient laser operation. Such resonator configurations are theoretically designed and implemented in a 10 kW-class COIL. Different resonator concepts are pre-evaluated by numerical methods with regard to their design and alignment sensitivities. Promising candidates are tested for their alignment performance and brightness parameters. Among others, hybrid resonators are found to be of straightforward optical architecture meeting the above challenges. Theoretical predictions and experimental results are in excellent agreement. Therefore, further promising design approaches, like multi-pass hybrid resonators or the modified negative-branch unstable resonator, will be depicted and discussed within this paper.

Paper Details

Date Published: 12 April 2007
PDF: 10 pages
Proc. SPIE 6611, Laser Optics 2006: High-Power Gas Lasers, 661106 (12 April 2007); doi: 10.1117/12.740579
Show Author Affiliations
Karin M. Gruenewald, DLR, Institute for Technical Physics (Germany)

Published in SPIE Proceedings Vol. 6611:
Laser Optics 2006: High-Power Gas Lasers
Oleg B. Danilov, Editor(s)

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