Falcao, E. L.Bosco, CACMaciel, G. S.de Araujo, C. B.Acioli, L. H.Nalin, Marcelo [UNESP]Messaddeq, Younes [UNESP]2014-05-202014-05-202003-08-18Applied Physics Letters. Melville: Amer Inst Physics, v. 83, n. 7, p. 1292-1294, 2003.0003-6951http://hdl.handle.net/11449/31960We report on the ultrafast nonlinearity of antimony polyphosphate glasses measured using the Kerr shutter technique. The nonlinear refractive index, n(2), was (1.1+/-0.2)x10(-14) cm(2)/W at 800 nm, and enhancement of n(2) by approximate to80% was observed by adding 10% of lead oxide in the glass composition. The full width at half-maximum of the third-order correlation signal was 150 fs, which implies a fast response of the samples (less than or equal to100 fs). Nonlinear absorption was negligible in the range of intensities used. (C) 2003 American Institute of Physics.1292-1294engArtigo10.1063/1.1601679WOS:000184748600004Acesso abertoWOS000184748600004.pdf29985038419178153349586880746735