Ultrafast nonresonant third-order optical nonlinearity of the 0.64GeS2–0.16Ga2S3–0.2CsCl chalcohalide glass
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Over the last few years, great efforts have been made about the research and development of highly nonlinear optical materials for applications such as all-optical switching devices in the optical telecommunication field. In particular, among the materials available to date, chalcogenide glasses are emerging as the promising candidates for future compact and high efficiency all-optical switching devices due to their large electronic nonlinear refractive indices and high abilities to drawing fibers with them [1, 2, 3, 4, 5]. Early in 1992 Masaki et al. have demonstrated that ultrafast all-optical switching with 14 W of switching power can be realized utilizing an only 48-cm long single-mode As2S3-based glass fiber according to an optical Kerr shutter configuration . And the large nonlinear refractive index (n2) of the As2S3-based glass, which was estimated to be 4 × 10−14 cm2/W, two orders larger than that of silica glass fibers, has been confirmed by switching characteristics....
KeywordsGa2S3 Pump Beam Chalcogenide Glass GeS2 Nonlinear Refractive Index
This work was partially funded by the National Natural Science Foundation of China (No. 50125205) and the Opening Fund of Key Laboratory of Silicate Materials Science and Engineering (Wuhan University of Technology) Ministry of Education (No. SYSJJ2004-14).