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Mode Dynamics and Thermal Lens Effects of Thin Disk Lasers

Mende, Jens and Spindler, Gerhard and Speiser, Jochen and Bohn, Willy L. and Giesen, Adolf (2007) Mode Dynamics and Thermal Lens Effects of Thin Disk Lasers. Lase 2008 (Part of SPIE Photonics West), 2008-01-19 - 2008-01-24, San Jose, CA, USA. (Submitted)

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In principle, the thin disk laser concept opens the possibility to demonstrate high power, high efficiency and good beam quality, simultaneously. For this purpose a very homogeneous pump power distribution on the disk is necessary as well as very low phase distortions of the disk itself. Spatial mode structure and thermal lensing effects in an Yb:YAG thin disk laser have been investigated as function of the pump power in linear and folded resonators. Whereas thermal lensing is shown to be very weak due to the thin disk geometry, a strong correlation of the laser mode with respect to the power density distribution of the pump radiation is exhibited. The experimental results are compared with numerical simulations of the field distribution within the resonator as well as in the far field demonstrating the excellent homogeneity of the disk as laser active medium. The results will be used for scaling the fundamental mode power into the multi-kW-regime.

Document Type:Conference or Workshop Item (Speech)
Title:Mode Dynamics and Thermal Lens Effects of Thin Disk Lasers
AuthorsInstitution or Email of Authors
Spindler, GerhardUNSPECIFIED
Speiser, JochenUNSPECIFIED
Date:27 December 2007
Keywords:thin disk laser, spatial mode structure, mode dynamics, simulation of field distribution, power scalability
Event Title:Lase 2008 (Part of SPIE Photonics West)
Event Location:San Jose, CA, USA
Event Type:international Conference
Event Dates:2008-01-19 - 2008-01-24
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L -- no assignement
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Dr. Jens Mende
Deposited On:15 Jan 2008
Last Modified:12 Dec 2013 20:27

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