Abstract

The third-harmonic optical susceptibility, ${\chi }^{(3)}(3\omega ;\omega ,\omega ,\omega )$, of a silicate glass ceramic containing sodium niobate nanocrystals was measured for incident broadband light with central frequency ω corresponding to $1900\mathrm{nm}$. Absolute values of $|{\chi }^{(3)}|$ and the dispersion of the refractive index from 600 to $1900\mathrm{nm}$ were measured using the spectrally resolved femtosecond Maker fringes technique. The experiments show that $|{\chi }^{(3)}|$ is 1 order of magnitude larger than silica, and it grows by $\sim 50\%$ when the volume fraction occupied by the nanocrystals increases up to 40%.

© 2011 Optical Society of America

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