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Third-order nonlinear optical properties of bismuth-borate glasses measured by conventional and thermally managed eclipse Z scan

By A.S.L. Gomes, E.L. Falcão Filho, C.B. de Araújo, Diego Rativa, R.E. de Araújo, Koichi Sakaguchi, Francesco P. Mezzapesa, Isabel C.S. Carvalho and Peter G. Kazansky

Abstract

Third-order nonlinearity one order of magnitude larger than silica is measured in bismuth-borate glasses presenting a fast response (<200 fs). The results for the sign and magnitude of the nonlinearity were obtained using a combination of the eclipse Z scan with thermal nonlinearity managed Z scan, whereas the Kerr shutter technique was employed to obtain the electronic time response of the nonlinearity, all performed with 76 MHz repetition rate 150 fs pulses at 800 nm. Conventional Z scans in the picosecond regime at 532 and 1064 nm were also independently performed, yielding the values of the third-order nonlinear susceptibilities at those wavelengths. The results obtained for the femtosecond response, enhanced third-order nonlinearity of this glass (with respect to silica), place this glass system as an important tool in the development of photonics devices. Electro-optical modulators, optical switches, and frequency converters are some of the applications using second-order nonlinear properties of the Bi-glass based on the rectification model

Topics: QC, TK
Year: 2007
OAI identifier: oai:eprints.soton.ac.uk:46865
Provided by: e-Prints Soton

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