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Hybrid Resonator Configurations for COIL

Duschek, Frank and Handke, Jürgen and Hall, Thomas and Grünewald, Karin M. (2006) Hybrid Resonator Configurations for COIL. In: Proceedings SPIE. SPIE International Conference on High-Power Laser Ablation 2006, [2006-05-07 - 2006-05-12], Taos, NM (USA). (Submitted)

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Official URL: http://spie.org/Conferences/programs/06/hp/


Abstract Various schemes of geometrical coupling between optical resonator and gain medium were investigated for a 10-kW class Chemical Oxygen-Iodine Laser (COIL). Starting from theory, dierent types of resonator layouts were designed and optimized for COIL with a rectangular gain medium and an output coupling of about 10%. Hybrid resonators match these coupling conditions more easily than concentric unstable resonators. Compared to the negative branch type, the positive branch hybrid resonator shows very high sensitivity to the optical alignment in the unstable direction but avoids a focal line within the resonator. The obtained output power of both hybrid resonators is compared to the output power of the COIL device in a conventional stable resonator configuration. Measured margins for the sensitivity of resonator setup and alignment were found in close agreement with numerical calculations. Power density distributions were measured in the near field and in the far field by an infrared camera system. The divergence of the emitted laser beam in the unstable direction was nearly diffraction limited.

Item URL in elib:https://elib.dlr.de/22443/
Document Type:Conference or Workshop Item (Speech)
Title:Hybrid Resonator Configurations for COIL
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:2 January 2006
Journal or Publication Title:Proceedings SPIE
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:COIL, chemical oxygen-iodine laser, optical resonator, hybrid resonator, beam quality
Event Title:SPIE International Conference on High-Power Laser Ablation 2006
Event Location:Taos, NM (USA)
Event Type:international Conference
Event Dates:[2006-05-07 - 2006-05-12]
Organizer:SPIE—The International Society for Optical Engineering
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology (old)
Location: Lampoldshausen , Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Duschek, Dr.rer.nat. Frank
Deposited On:27 Feb 2006
Last Modified:27 Apr 2009 05:01

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