J. Phys. IV France 125 (2005) 465-468
DOI: 10.1051/jp4:2005125109

Comparative photoacoustic determination of the heat generated by Nd³+ ions at different laser transitions in proton implanted Nd:YAG planar waveguide

G.A. Torchia^{1, 2}, G.V. Vazquez³, E. Cantelar¹, G. Lifante¹ and F. Cussó<sup>1

1</sup>  Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain
²  Centro de Investigaciones Ópticas-CIC-CONICET, Casilla de Correo 124, 1900 La Plata, Argentina
³  Centro de Investigaciones en Óptica, Loma del Bosque 115, Lomas del Campestre, Apdo. Postal 1-948, 37000 León, Gto., Mexico

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Abstract
This work presents the photoacoustic determination of the of heat generation for 1.064 m and 1.34 m laser emission in proton implanted Nd:YAG planar waveguide. For laser operation at 1.064 m and 1.34 m the experimental ratio of the heat generated for both luminescence regimes are 0.63 ± 0.03 and 1.00 ± 0.05, respectively. These values show good agreement with theoretical estimation also included in this work. The integrated device operating at 1.34 m presents a lower laser performance due to the weak heat evacuation observed under stimulated regime that would produce important changes in the refractive index. In contrast laser operation at 1.064 m could support high pump sources due to the strong heat reduction from spontaneous to stimulated luminescence regime.

© EDP Sciences 2005