Please use this identifier to cite or link to this item: doi:10.22028/D291-24214
Title: Time-resolved Z-scan and thermal lens measurements in Er+3 and Nd+3 doped fluoroindate glasses
Author(s): Catunda, T.
Baesso, M.L.
Messaddeq, Younes
Aegerter, Michel A.
Language: English
Year of Publication: 1997
OPUS Source: Journal of non-crystalline solids. - 213/214. - 1997, S. 225-230
SWD key words: Polarisation
Optisches Pumpen
DDC notations: 500 Science
Publikation type: Journal Article
Abstract: In rare earth ion doped solids, a resonant non-linear refractive index, n2, appears when the laser pumps one of the ion excited states and the refractive index change is proportional to the excited state population. In these solids there are usually thermal and non-thermal lensing effects, where the non-thermal one is due to the polarizability difference, between excited and ground states of the ions. We have used the time resolved Z-scan and a mode-mismatched thermal lens technique with an Ar+ ion laser in Er+3 (20ZnF2-20SrF2-2NaF-16BaF2-6GaF3-(36-x)InF3-xErF3, with x=1, 2, 3 and 4 mol%) and Nd+3 (20SrF2-16BaF2-20ZnF2-2GdF3-2NaF-(40-x)InF3-xNdF3, with x=0.1, 0.25, 0.5-1 mol%) doped fluoroindate glasses. In both samples we found that the non-linear refraction is due to the thermal effect, while the non-thermal effect is negligible. This result indicates that in fluoride glasses &Dgr;&agr; is very small (less than 10-26 cm3). We also measured the imaginary part of the non-linear refractive index due to absorption saturation.
Link to this record: urn:nbn:de:bsz:291-scidok-24463
Date of registration: 16-Nov-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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