Abstract
Highly nonlinear optical materials are of large interest for a number of current photonic applications including optical limiting and all-optical switching. Amongst the materials available to date antimony based glasses are emerging as promising systems for such applications [1-3]. These glasses which have antimony oxide as their main component, present high refractive index, large infrared transmission window and high thermal stability. In a previous study, at 532nm, it was measured large nonlinear absorption coefficients up to 20 cm/GW [3]; also photoinduced modifications of theses glasses were observed. In this work, using the Kerr shutter technique with heterodyne detection, we report measurements of the near infrared third-order nonlinear optical response of antimony glasses. Three groups of glasses compositions were studied. In the first group, a binary composition of Sb2O3-SbPO4, with different relative concentrations, was investigated. In the second one, it was included lead oxide in the composition of the first group which increases the nonlinearity by 80%. In the last group, antimony polyphosphate, Sb(PO3)3, was used in the glass matrix presenting the largest nonlinearity when lead oxide is added.
© 2003 Optical Society of America
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