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Monolithic thin-disk laser and amplifier concept

Lorbeer, Raoul-Amadeus and Ewers, Benjamin and Santek, Christopher and Beisecker, Denise and Speiser, Jochen and Dekorsy, Thomas (2020) Monolithic thin-disk laser and amplifier concept. Optica, 7 (10), pp. 1409-1414. Optical Society of America. doi: 10.1364/OPTICA.402164. ISSN 2334-2536.

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Official URL: http://www.osapublishing.org/optica/abstract.cfm?URI=optica-7-10-1409


Thin-disk lasers are indispensable in photonics research as well as in a multitude of industrial applications. They represent a unique class of laser and amplifier architecture that provides kW output power with excellent properties concerning beam quality, long-term stability, thermal management, and power scalability. For many applications, a reduced complexity of the laser and its size would be highly beneficial. The necessary multipass transitions in thin-disk lasers and amplifiers typically require sophisticated multi-mirror arrangements. Here, we present a monolithic version of the pump concept for thin-disk lasers and amplifiers, where the thin disk is replaced by a thin, wedged gain medium acting as a wedged optical trap. The wedge is coated in a peculiar manner in order to allow for efficient in- and out-coupling of the pump and laser radiation from the wedge. This concept transfers the complexity of the multi-mirror optics into the thin disk itself in a monolithic fashion. With this concept, we achieved 890 W of CW output power, 59% slope efficiency, optical-to-optical efficiency of 50%, and a gain factor greater than 10 for small signals. This demonstrates that this new concept is capable of reaching the kW power regime with minimum complexity and size.

Item URL in elib:https://elib.dlr.de/136915/
Document Type:Article
Title:Monolithic thin-disk laser and amplifier concept
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lorbeer, Raoul-Amadeusraoul.lorbeer (at) dlr.dehttps://orcid.org/0000-0003-3674-9796
Ewers, Benjaminbenjamin.ewers (at) dlr.deUNSPECIFIED
Santek, Christopherchristopher.santek (at) dlr.deUNSPECIFIED
Beisecker, DeniseDenise.Beisecker (at) dlr.deUNSPECIFIED
Speiser, JochenJochen.Speiser (at) dlr.deUNSPECIFIED
Dekorsy, ThomasThomas.Dekorsy (at) dlr.dehttps://orcid.org/0000-0003-2257-2854
Date:October 2020
Journal or Publication Title:Optica
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.1364/OPTICA.402164
Page Range:pp. 1409-1414
Publisher:Optical Society of America
Keywords:Fiber lasers; High power lasers; Laser amplifiers; Laser beams; Solid state lasers; Thin disk lasers
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology (old)
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Lorbeer, Raoul-Amadeus
Deposited On:18 Nov 2020 09:27
Last Modified:18 Nov 2020 09:27

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