Time-resolved thermal lens measurements of thermo-optical properties of fluoride glasses

• Published in: Journal of non-crystalline solids Vol. 256; pp. 337 - 342
• Main Authors: Lima, S.M, Sampaio, J.A, Catunda, T, Lebullenger, R, Hernandes, A.C, Baesso, M.L, Bento, A.C, Gandra, F.C.G
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.1999
• Subjects: T145; F171; O110; T150; T140
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/S0022-3093(99)00489-5

We present measurements of the temperature coefficient of optical path change, d s/d T, thermal diffusivity, D, and conductivity, K, using time-resolved mode-mismatched thermal lens method for fluoride (mol%) 53ZrF 4–4.5LaF 3–3.5AlF 3–29BaF 2–10NaF (ZBLAN), fluoroaluminate 20YF 3–40AlF 3–20CaF 2–20BaF 2 (YABC) and fluoroindates 20GaF 3–15InF 3–20CaF 2–15ZnF 2–30PbF 2 (PGIZCa), 6GaF 3–34InF 3–20SrF 2–16BaF 2–20ZnF 2–4NaF (ISZn), 2GdF 3–40InF 3–20SrF 2–16BaF 2–20ZnF 2–2%NaF (InSBZnGdN). All the samples were crystal free, as verified by X-ray diffraction (XRD), and were at least 3 mm thick. The d s/d T of our samples was negative, the thermal diffusivity, D, was found to vary between 2.5 and 3.3 × 10 −3 cm 2/s, and the thermal conductivity, K, varied between 7.4 and 10.3 × 10 −3 W/K cm.