Measurement of the third-order susceptibility of glasses by EFISH of femtosecond pulses.
We propose a simple technique based on electric field induced second harmonic (EFISH) generation of femtosecond pulses to measure the third order susceptibility x ;(3) (2 omega,0,omega,omega) in glasses. First we present the principle of the method, then we validate our experimental set-up and develop unexpected aspects of EFISH technique. Finally, we give a numerical value of the third order susceptibility in various glasses and discuss these results.
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Guillet de Chatellus
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Freysz