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Proceedings Article

Analysis of frequency dependent pump light absorption

[+] Author Affiliations
Matthias Wohlmuth, Christoph Pflaum

Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)

Proc. SPIE 7913, Laser Resonators and Beam Control XIII, 791303 (February 07, 2011); doi:10.1117/12.874793
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From Conference Volume 7913

  • Laser Resonators and Beam Control XIII
  • Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko
  • San Francisco, California, USA | January 22, 2011

abstract

Simulations have to accurately model thermal lensing in order to help improving resonator design of diode pumped solid state lasers. To this end, a precise description of the pump light absorption is an important prerequisite. In this paper, we discuss the frequency dependency of the pump light absorption in the laser crystal and its influence on the simulated laser performance. The results show that the pump light absorption has to include the spectral overlap of the emitting pump source and the absorbing laser material. This information can either be used for a fully frequency dependent absorption model or, at least in the shown examples, to compute an effective value for an exponential Beer-Lambert law of absorption. This is particularly significant at pump wavelengths coinciding with a peak of absorption. Consequences for laser stability and performance are analyzed for different pump wavelengths in a Nd:YAG laser.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Matthias Wohlmuth and Christoph Pflaum
"Analysis of frequency dependent pump light absorption", Proc. SPIE 7913, Laser Resonators and Beam Control XIII, 791303 (February 07, 2011); doi:10.1117/12.874793; http://dx.doi.org/10.1117/12.874793


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