Abstract
Nonresonant-type homogeneous glasses were prepared by melting. The third-order optical nonlinear susceptibility which was determined by measurement of third-harmonic generation, increased with increasing concentrations of in the glass. The maximum estimated was in glass that contained 92 wt. % of values of these glasses were enhanced by the small optical bandgap. These glasses also exhibited an ultrafast response time, less than 200 fs, when a degenerate four-wave mixing method with a femtosecond laser was used, indicating that the nonlinearity of these glasses originated mainly from pure electronic polarization.
© 1999 Optical Society of America
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