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

• Main Authors: Gomes, A.S.L (Author), Falcão Filho, E.L (Author), de Araújo, C.B (Author), Rativa, Diego (Author), de Araújo, R.E (Author), Sakaguchi, Koichi (Author), Mezzapesa, Francesco P. (Author), Carvalho, Isabel C.S (Author), Kazansky, Peter G. (Author)
• Format: Article
• Language: English
• Published: 2007.
• Subjects: Article
• Online Access: Get fulltext

 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.