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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 24 — Nov. 24, 2008
  • pp: 20106–20116

End-pumped Nd:YAG laser with a longitudinal hyperbolic dopant concentration profile

Ralf Wilhelm, Denis Freiburg, Maik Frede, and Dietmar Kracht  »View Author Affiliations


Optics Express, Vol. 16, Issue 24, pp. 20106-20116 (2008)
http://dx.doi.org/10.1364/OE.16.020106


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Abstract

An approach for scaling end-pumped rod lasers to high output powers by employing a crystal with a continuously varying, nearly hyperbolic dopant concentration profile, resulting in a homogenization of the longitudinal temperature distribution, is presented. The crystal is characterized by determining its dopant concentration profile with an absorption measurement. The fluorescence upon spectrally narrow excitation is recorded, indicating the role of quenching of the upper laser level at high dopant concentration. The on-axis temperature distribution is calculated by employing a Fourier-Bessel approach for solving the stationary heat conduction equation, taking the temperature dependence of the heat conductivity and the dependence of the heat fraction on the dopant concentration into account. Experimentally, a maximum output power of 187W at an optical-to-optical efficiency of 53 % has been demonstrated.

© 2008 Optical Society of America

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3580) Lasers and laser optics : Lasers, solid-state

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 22, 2008
Revised Manuscript: October 24, 2008
Manuscript Accepted: October 27, 2008
Published: November 21, 2008

Citation
Ralf Wilhelm, Denis Freiburg, Maik Frede, and Dietmar Kracht, "End-pumped Nd:YAG laser with a longitudinal hyperbolic dopant concentration profile," Opt. Express 16, 20106-20116 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-24-20106


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References

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