Nonlinear optical properties in bismuth-based glasses
Jianliang Zhang , Qiuhua Nie , Shixun Dai , Tiefeng Xu , Feifei Chen , Xiang Shen , Xunsi Wang
Journal of Wuhan University of Technology Materials Science Edition ›› 2011, Vol. 26 ›› Issue (1) : 61 -64.
Nonlinear optical properties in bismuth-based glasses
A series of glasses with high Bi2O3 content of Bi2O3-B2O3-WO3 ternary system were chosen and prepared. Their densities and linear refractive indices increase with increasing WO3 content. The optical band gaps E opt of glasses obtained from ultraviolet absorption edges decreases with increase of WO3 content. Z-scan technique was carried out to investigate the third-order nonlinear optical properties of the glasses. It is found that the nonlinear refraction γ increases with decreasing the optical band gap E opt, since an increase of WO3 content can promote the non-bridging oxygen ion content, and the highest γ value of samples is 1.173×10−14 cm2/W. The results show that these glasses are potential materials in the application of third-order nonlinear optics field.
bismuth glasses / optical band gap / third-order nonlinear / Z-scan
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