TITLE

Time-resolved thermal lens determination of the thermo-optical coefficients in Nd-doped yttrium aluminum garnet as a function of temperature

AUTHOR(S)
Nunes, A.R.; Rohling, J.H.; Medina, A.N.; Pereira, J.R.D.; Bento, A.C.; Baesso, M.L.; Nunes, L.A.O.; Catunda, T.
PUB. DATE
June 2004
SOURCE
Applied Physics Letters;6/21/2004, Vol. 84 Issue 25, p5183
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this work, time-resolved thermal lens measurements are carried out in Nd-doped yttrium aluminum garnet laser crystal as a function of temperature. The temperature coefficient of the optical path length, the thermal diffusivity, and the thermal conductivity were determined in the temperature range between 22 °C and 180 °C. In addition, the specific heat was measured by the thermal relaxation method in the same temperature range. The results showed that the thermal conductivity and the temperature coefficient of the optical path length are responsible for the strong increase of the thermal lens amplitude when the sample temperature was increased. These results suggest that the time resolved procedure is useful in the study of laser materials and may be an important tool for laser designers.
ACCESSION #
13538768

 

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