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Nonlinear refractive indexes and two-photon absorption coefficients of new biosilicate nanocomposite materials based on precursor tetrakis (2-hydroxyethyl) orthosilicate (Si-precursor THEOS) were determined by created portative automation measuring complex based on Z-scan technique. Influence of different additives on nonlinear optical properties such media is considered. Energy thresholds of forming filaments and the efficiency of conversion initial radiation in supercontinuum in the range 400-700 nm are considered.

Our work is dedicated for review of the synthesis of the new nanocomposite media with Au and CdS nanoparticles. Also formation of filament structure in presented samples as result of interaction with femtosecond laser pulses in depending on the component composition of the samples and the various experimental conditions was investigated.

The transmission of the femtosecond laser pulses by new biosilicate nanocomposite materials has been experimentally investigated. The strong nonlinear optical properties of these nanocomposite structures have been revealed in spectral characteristics of transmitted ultrashort pulses. The shape of transmitted spectrums through new nanocomposite biomaterials demonstrates major changes indicating the broadening with formation a strong anti Stokes component in the output spectrum with generation of supercontinuum spectra. The carried out studies have showed that the optical nonlinearity of new nanocomposite materials can be regulated by trace amounts of Au or CdS nanoparticles.