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Unstable resonator with reduced output coupling

Pargmann, Carsten and Hall, Thomas and Duschek, Frank and Grünewald, Karin and Handke, Jürgen (2012) Unstable resonator with reduced output coupling. Applied Optics, 51 (18), pp. 4219-4223. Optical Society of America. ISSN 1559-128X.

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The properties of a laser beam coupled out of a standard unstable laser resonator are heavily dependent on the chosen resonator magnification. A higher magnification results in a higher output coupling and a better beam quality. But in some configurations, an unstable resonator with a low output coupling in combination with a good beam quality is desirable. In order to reduce the output coupling for a particular resonator, magnification fractions of the outcoupled radiation are reflected back into the cavity. In the confocal case, the output mirror consists of a spherical inner section with a high reflectivity and a flat outer section with a partial reflectivity coating. With the application of the unstable resonator with reduced output coupling (URROC), magnification and output coupling can be adjusted independently from each other and it is possible to get a good beam quality and a high power extraction for lasers with a large low gain medium. The feasibility of this resonator design is examined numerically and experimentally with the help of a chemical oxygen iodine laser.

Item URL in elib:https://elib.dlr.de/81588/
Document Type:Article
Title:Unstable resonator with reduced output coupling
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Pargmann, Carstencarsten.pargmann (at) dlr.deUNSPECIFIED
Hall, Thomasthomas.hall (at) dlr.deUNSPECIFIED
Duschek, FrankFrank.Duschek (at) dlr.deUNSPECIFIED
Grünewald, Karinkarin.gruenewald (at) dlr.deUNSPECIFIED
Handke, Jürgenjuergen.handke (at) dlr.deUNSPECIFIED
Date:20 June 2012
Journal or Publication Title:Applied Optics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 4219-4223
Publisher:Optical Society of America
Series Name:Applied Optics
Keywords:optical resonator, laser resonator, beam quality, chemical, oxygen iodine laser
HGF - Research field:Aeronautics, Space and Transport
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
Institutes and Institutions:Institute of Technical Physics > Atmospheric Propagation and Effect
Deposited By: Pargmann, Dr. Carsten
Deposited On:20 Mar 2013 10:58
Last Modified:10 Jan 2019 15:46

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