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Proceedings Paper

Heat dissipation study of polymeric dye laser materials by using photothermal deflection spectroscopy
Author(s): Lucia B. Scaffardi; R. Duchowicz; Angel Costela; Inmaculada Garcia-Moreno; Roberto Sastre; A. U. Acuna
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Paper Abstract

The main shortcoming of the use of synthetic polymers as host in the development of dye laser materials is their low laser-damage threshold and the photodegradation of the dye. The more important process that limit the lifetime of the material should be a photochemical mechanism although photothermal processes produce some contributions. In this work, we have investigated the thermal response of the material when different quantities of energy are loaded during the pump process. Photothermal deflection spectroscopy was used in the investigation. The characteristics of the photothermal signal were analyzed as a function of the laser repetition rate. This study is related wit the decay of the laser output energy with the pump rate due to photodegradation observed previously in similar samples. Results show that the photothermal signal follows a linear dependence with the pump rate. The thermal effects increase strongly when the pump rate is larger than 1 Hz. This fact affects the mobility of the dye molecules and reactive species in the matrix, increasing the possibility of chemical degradation. Results of a theoretical simulation of the deflection signal using an optical dense materials model is included.

Paper Details

Date Published: 14 August 2001
PDF: 4 pages
Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); doi: 10.1117/12.437077
Show Author Affiliations
Lucia B. Scaffardi, Ctr. de Investigaciones Opticas and Univ. Nacional de La Plata (Argentina)
R. Duchowicz, Ctr. de Investigaciones Opticas (Argentina)
Angel Costela, Consejo Superior de Investigaciones de Optica (Spain)
Inmaculada Garcia-Moreno, Consejo Superior de Investigaciones de Optica (Spain)
Roberto Sastre, Consejo Superior de Investigaciones Cientificas (Spain)
A. U. Acuna, Consejo Superior de Investigaciones Cientificas (Spain)

Published in SPIE Proceedings Vol. 4419:
4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications
Vera L. Brudny; Silvia A. Ledesma; Mario C. Marconi, Editor(s)

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