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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 15 — Aug. 1, 2012
  • pp: 3045–3047

Enhanced performance of thin-disk lasers by pumping into the zero-phonon line

Birgit Weichelt, Andreas Voss, Marwan Abdou Ahmed, and Thomas Graf  »View Author Affiliations


Optics Letters, Vol. 37, Issue 15, pp. 3045-3047 (2012)
http://dx.doi.org/10.1364/OL.37.003045


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Abstract

Pumping Yb:YAG or Yb:LuAG into the zero-phonon line at 969 nm instead of using the common pump wavelength of 940 nm reduces the heat generation by 32%. In addition to the 3% increase of the Stokes efficiency, this significantly reduces the diffraction losses caused by the thermally induced phase distortions leading to a remarkable increase of the overall efficiency especially of fundamental-mode thin-disk lasers. Using this pumping scheme in an Yb:LuAG thin-disk laser, we achieved 742 W of nearly diffraction limited (M21.5) output power at an unprecedented high optical efficiency of 58.5%. For multimode operation (M215) the maximum optical efficiency of an Yb:YAG thin-disk laser was increased to 72%.

© 2012 Optical Society of America

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.6810) Lasers and laser optics : Thermal effects
(140.3615) Lasers and laser optics : Lasers, ytterbium

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: May 14, 2012
Manuscript Accepted: June 2, 2012
Published: July 16, 2012

Citation
Birgit Weichelt, Andreas Voss, Marwan Abdou Ahmed, and Thomas Graf, "Enhanced performance of thin-disk lasers by pumping into the zero-phonon line," Opt. Lett. 37, 3045-3047 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-15-3045

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