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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 9 — Sep. 1, 2007
  • pp: 2081–2089

Effects of the temperature dependence of absorption coefficients in edge-pumped Yb:YAG slab lasers

Qiang Liu, Xing Fu, Mali Gong, and Lei Huang  »View Author Affiliations

JOSA B, Vol. 24, Issue 9, pp. 2081-2089 (2007)

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A study of the temperature dependence on an absorption coefficient is presented. We describe the absorption spectrum measurement of the laser material Yb:YAG that was performed over a wide temperature range. As the temperature increases from 23 ° C to 300 ° C , the central wavelength of the Yb:YAG absorption spectrum at 940 nm varies slightly from 941.2 nm to 941.1 nm , and the maximal absorption cross section drops dramatically from 7.89 × 10 21 cm 2 to 4.23 × 10 21 cm 2 . According to our experimental results, we have presented an analytic description of temperature distribution with the numerical iterative method and have investigated the pumping optimization and laser oscillator performance, taking into account that the absorption coefficient is strongly influenced by temperature. Our analyses also include the effect of pump absorption saturation and the temperature dependence of Boltzmann population fractions, stimulated emission cross section, and thermal conductivity. We have shown that the predicted laser output power exceeds the actual value if the temperature dependence of Yb:YAG’s absorption coefficient is neglected.

© 2007 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

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 23, 2006
Revised Manuscript: April 23, 2007
Manuscript Accepted: April 24, 2007
Published: July 31, 2007

Qiang Liu, Xing Fu, Mali Gong, and Lei Huang, "Effects of the temperature dependence of absorption coefficients in edge-pumped Yb:YAG slab lasers," J. Opt. Soc. Am. B 24, 2081-2089 (2007)

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