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Thermo-optics parameters measurements in photorefractive sillenite Bi12SiO20 crystals by thermal lens technique

M. R. R. GESUALDI1,* , C. JACINTO2, A. A. ANDRADE3, T. CATUNDA4, M. MURAMATSU5

Affiliation

  1. Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas, Universidade Federal do ABC, CEP09210-170, Santo André, SP, Brazil
  2. Instituto de Física, Universidade Federal de Alagoas, CEP57072-970, Maceió, AL, Brazil
  3. Instituto de Física, Universidade Federal de Uberlândia, CEP38400-902, Uberlândia, MG, Brazil
  4. Instituto de Física de São Carlos, Universidade de São Paulo, CEP13560-970, São Carlos, SP, Brazil
  5. Instituto de Física, Universidade de São Paulo, CEP05508-090, São Paulo, SP, Brazil

Abstract

The present work reports on the thermo-optical properties of photorefractive sillenite Bi12SiO20 (BSO) crystals obtained by applying the Thermal Lens Spectrometry technique (TLS). This crystals presents one high photorefractive sensitivity in the region blue-green spectra, since the measurements were carried out at two pump beam wavelengths (514.5 nm and 750 nm) to study of the light-induced effects in this material (thermal and/or photorefractive). We determine thermo-optical parameters like thermal diffusivity (D), thermal conductivity (K) and temperature coefficient of the optical path length change (ds/dT) in sillenite crystals. These aspects, for what we know, not was studied in details up to now using the lens spectrometry technique and are very important against of the promising potentiality of applications these crystals in non linear optics, real time holography and optical processing data..

Keywords

Photorefractive materials, Photorefractive effects, Thermo-optical effects, Thermal lens technique.

Submitted at: Nov. 29, 2010
Accepted at: June 9, 2011

Citation

M. R. R. GESUALDI, C. JACINTO, A. A. ANDRADE, T. CATUNDA, M. MURAMATSU, Thermo-optics parameters measurements in photorefractive sillenite Bi12SiO20 crystals by thermal lens technique, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 6, pp. 643-647 (2011)