Abstract

We present the measurement of the third-order nonlinearity of Bi<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub>-BaO glasses using the single Z-scan method with femtosecond laser pulses at 750-850 nm. Both third-order nonlinear refraction γ and two photon absorption coefficient β are investigated. The γ shows an increasing tendency with increasing BaO content, and the largest value is estimated to be 7.2×10<sup>-14</sup> cm<sup>2</sup>/W, which is as large as those of chalcogenide glasses. The dependence of β on the normalized photon energy is studied.

© 2010 Chinese Optics Letters

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