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Excited state absorption of pump and laser radiations in NYAB non-linear crystal operating at 1.3 µm for visible laser light generation

Published online by Cambridge University Press:  15 April 2000

D. Jaque ,
J. García Solé ,
A. Brenier ,
G. Boulon  and
Z. D. Luo
D. Jaque
Affiliation:
Departamento de Física de Materiales, Universidad Autonoma de Madrid, Cantoblanco 28049, Madrid, Spain
J. García Solé*
Affiliation:
Departamento de Física de Materiales, Universidad Autonoma de Madrid, Cantoblanco 28049, Madrid, Spain
A. Brenier
Affiliation:
Laboratoire de Physico-Chimie des Matériaux Luminiscents (UMR CNRS 5620), Université Claude Bernard-Lyon, 69629 Villeurbane, France
G. Boulon
Affiliation:
Laboratoire de Physico-Chimie des Matériaux Luminiscents (UMR CNRS 5620), Université Claude Bernard-Lyon, 69629 Villeurbane, France
Z. D. Luo
Affiliation:
Fujian Institute of Research on The Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P.R. China
*
Jose.Garcia_Sole@uam.es
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Abstract

Excited state absorption of laser (≅ 1.3 µm, corresponding to the $^4{\rm F}_{3/2}\to {}^{4}I_{13/2}$ laser channel) and pump (790-860 nm) radiation have beeninvestigated in Nd doped YAl3(BO3)4 non-linear laser crystal. Laser gain slope efficiencymeasurements as a function of pump wavelength have been used to estimate the excited state absorption ofpump radiation. On the other hand, excited state absorption cross-section in the 1300−1400 nmwavelength range has been measured by using two beam spectroscopy. We have obtained that excited stateabsorption cross-section for pump radiation is negligible whereas around 1.3 µm it is comparable tothe stimulated emission cross-section from 4F3/2 state, so that the net gain cross-sectionbecomes negative for certain wavelengths.

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Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 10 , Issue 1 , April 2000 , pp. 29 - 32
Copyright
© EDP Sciences, 2000

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