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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 22 — Nov. 15, 2013
  • pp: 4766–4769

Thermal behavior of resonant waveguide-grating mirrors in Yb:YAG thin-disk lasers

Martin Rumpel, Benjamin Dannecker, Andreas Voss, Michael Moeller, Christian Moormann, Thomas Graf, and Marwan Abdou Ahmed  »View Author Affiliations


Optics Letters, Vol. 38, Issue 22, pp. 4766-4769 (2013)
http://dx.doi.org/10.1364/OL.38.004766


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Abstract

We present the experimental investigations of different designs of resonant waveguide-grating (RWG) mirrors, used as intracavity folding mirrors in an Yb:YAG thin-disk laser (TDL). The investigation was focused on the rise of the surface temperature due to the coupling of the incident radiation to a waveguide mode as well as on laser efficiency, polarization, and wavelength selectivity. It was found that the damage threshold and efficiency can be increased significantly with a proper design of the structure in comparison to the simplest design with a single waveguide layer. So far, the presented RWG allow the generation of linear polarization with a narrow spectral linewidth down to 25 pm FWHM in a fundamental mode Yb:YAG TDL. Damage thresholds of 60 kW / cm 2 have been reached where only 63 K of surface temperature increase was observed. This showed that the improved mirrors are suitable for the generation of kW-class narrow linewidth, linearly polarized Yb:YAG TDL.

© 2013 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(230.5440) Optical devices : Polarization-selective devices
(140.3425) Lasers and laser optics : Laser stabilization
(230.7408) Optical devices : Wavelength filtering devices

ToC Category:
Optical Devices

History
Original Manuscript: August 9, 2013
Revised Manuscript: October 2, 2013
Manuscript Accepted: October 12, 2013
Published: November 12, 2013

Citation
Martin Rumpel, Benjamin Dannecker, Andreas Voss, Michael Moeller, Christian Moormann, Thomas Graf, and Marwan Abdou Ahmed, "Thermal behavior of resonant waveguide-grating mirrors in Yb:YAG thin-disk lasers," Opt. Lett. 38, 4766-4769 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-22-4766


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