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Performance of a Modified Negative Branch Unstable Resonator

Handke, Jürgen and Hall, Thomas and Pargmann, Carsten and Grünewald, Karin and Duschek, Frank (2007) Performance of a Modified Negative Branch Unstable Resonator. In: AIAA Journal. 38th AIAA Plasmadynamics and Lasers Conference, [2007-06-25 - 2007-06-28], Miami, FL (USA). ISSN 0001-1452

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Far field deployment of high power chemical oxygen iodine laser (COIL) affords optimally adapted resonator architectures. Such resonators shall enable high brightness operation. The different resonator concepts suffer from the low gain medium and the rectangular geometry typical of COIL. Even full exploitation of the laser active medium yields small outcoupling fractions and in consequence small magnifications for unstable resonator design. Additionally, the realization of suitable aspect ratios for the output aperture is difficult. An off-axis modified confocal negative branch unstable resonator (MNBUR) is recommended for high power COIL. For first verification tests, such a resonator is especially designed and coupled to a medium-sized COIL. Near field and far field characteristics are measured and compared to the theoretical predictions. The results and experiences gathered at the 10 kW-class DLR-COIL are encouraging to recommend MNBUR as a well suitable resonator for tactical COIL systems.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Performance of a Modified Negative Branch Unstable Resonator
AuthorsInstitution or Email of Authors
Pargmann, CarstenUNSPECIFIED
Grünewald, KarinUNSPECIFIED
Date:26 June 2007
Journal or Publication Title:AIAA Journal
Refereed publication:No
In ISI Web of Science:No
Keywords:high power lasers, COIL, unstable resonators, MNBUR
Event Title:38th AIAA Plasmadynamics and Lasers Conference
Event Location:Miami, FL (USA)
Event Type:international Conference
Event Dates:[2007-06-25 - 2007-06-28]
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology
Location: Lampoldshausen , Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Dr.rer.nat. Frank Duschek
Deposited On:09 Jul 2007
Last Modified:12 Dec 2013 20:25

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