Time resolved thermal lens measurements of the thermo-optical properties of glasses at low temperature down to 20 K

Author

Astrath, N.G.C. ; Bento, A.C. ; Medina, A.N. ; Baesso, M.L. ; Jacinto, C. ; Catunda, T. ; Lima, S.M. ; Bell, M.J.V. ; Anjos, V.

Author_Institution

Departamento de Fisica, Univ. Estadual de Maringa, Brazil

fYear

2005

fDate

12-17 June 2005

Firstpage

334

Abstract

In the present paper we extended the capability of the thermal lens spectrometry (TLS) to measure D, K and ds/dT of two oxide glasses, the low silica calcium aluminosilicate (LSCAS) and the soda-lime, as a function of temperature, between 20 and 300 K. The main contribution for the strong increase of ds/dT values as a function of temperature for LSCAS and soda lime glasses is a consequence of the increase in the electronic polarizability coefficient with temperature. The results of this work indicate that time resolved TL can be advantageously used to determine the TOP of glasses at low temperatures bringing new possibilities for experiments in a wide range of optical materials.

Keywords

aluminium compounds; aluminosilicate glasses; calcium compounds; optical glass; optical materials; polarisability; thermal lensing; time resolved spectroscopy; 20 to 300 K; Na₂OCaOSiO₂; SiO₂Al₂O₃CaO; ds-dT value; electronic polarizability coefficient; low silica calcium aluminosilicate glass; optical material; oxide glass; power dependence; soda-lime glass; thermal lens spectrometry; thermo-optical property; time resolved thermal lens measurement; Calcium; Glass; Lenses; Optical materials; Optical polarization; Silicon compounds; Spectroscopy; Temperature distribution; Thermal lensing; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Europe, 2005. CLEO/Europe. 2005 Conference on

Print_ISBN

0-7803-8974-3

Type

conf

DOI

10.1109/CLEOE.2005.1568117

Filename

1568117