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Master's Dissertation
DOI
10.11606/D.88.1999.tde-18082015-153036
Document
Author
Full name
Eik Tenório
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 1999
Supervisor
Committee
Catunda, Tomaz (President)
Baesso, Mauro Luciano
Zilio, Sérgio Carlos
Title in Portuguese
Estudo de efeitos de saturação no índice de refração não-linear de sólidos dopados
Keywords in Portuguese
Índice de refração não-linear
Sólidos dopados
Abstract in Portuguese
Neste trabalho investigamos o índice de refração não-linear n2, intensidade de saturação Is, tempo de vida τ0 e diferença de polarizabilidade Δα em absorvedores saturáveis dopados com Cr+3 usando a técnica Z-scan transiente. Utilizamos um modelo teórico baseado no formalismo da integral de difração de Kirchhoff para estudar o comportamento estacionário e transiente, além de observar, através de simulações numéricas, a evolução temporal do sinal observado experimentalmente. O modelo teórico foi estendido ao comportamento transiente, em que utilizamos parâmetros experimentais para realizar as simulações. No trabalho experimental medimos o cristal de rubi e calculamos os valores de Is, n2, τ0 e Δα para cinco linhas do laser de Ar+ através da técnica de Z-scan
Title in English
Not available
Keywords in English
Not available
Abstract in English
In this work we have investigated nonlinear refractive index n2, saturation intensity Is, lifetime response τ0, and polarizability difference Δα in saturable Cr+3 doped absorbers employing the time resolved Z-scan technique by nonlinear refraction transient. We have developed a theoretical model, based on the Kirchhoff diffraction integral formalism to study the transient and stationary behavior, and besides, we have observed, from numerical simulations, the time signal evolution of the experimentally observed signal. The theoretical model was extended to transient behavior, where we have used experimental parameters to numerical simulations employing the theoretical model. In the experimental work we have measured the ruby crystal and we calculated the values Is, n2, τ0 and Δα for the five lines from an Ar+ laser employing the Z-scan technique
 
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EikTenorioM.pdf (10.22 Mbytes)
Publishing Date
2015-08-19
 
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