Mid-infrared optical nonlinearities of chalcogenide glasses in Ge-Sb-Se ternary system
Date
2015-01-20
Authors
Dai, Shixun
Chen, Feifei
Xu, Yinsheng
Xu, Zhe
Shen, Xiang
Xu, Tiefeng
Wang, Rongping
Ji, Wei
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Optical Society of America
Abstract
Optical nonlinearities of chalcogenide glasses in the Ge-Sb-Se ternary system are investigated at mid-infrared wavelengths (2000 and 2500 nm) with femtosecond Z-scan technique. Strong nonlinear refraction in the chalcogenide glasses is observed at 2000 nm, due to three-photon absorption resonance. In addition, the variation in the nonlinear refraction (γ) of the Ge-Sb-Se glasses shows two jumpoints as mean co-ordination number (MCN) approaches 2.4 or 2.7, consistent with the theoretical predication.
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Source
Optics express
Type
Journal article