用Z扫描方法测试Bi2O3-B2O3-SiO2玻璃的三阶非线性光学性质  

Z-scan Measurement of Third-order Nonlinear Optical Properties of Bi2O3-B2O3-SiO2 Glass

作　　者：陈燕飞[1] 聂秋华[1] 徐铁峰[1] 戴世勋[1] 沈祥[1] 

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《武汉理工大学学报》2007年第E01期16-19,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金（60677015）和宁波市自然科学基金（2006A610020）

摘　　要：用高温熔融法制备了x Bi2O3—20B2O3-（80-x）SiO2（Bx，x=60mol％、65mol％、70mol％）系列玻璃，借助钛宝石飞秒激光器采用Z扫描方法测试了样品的三阶非线性光学特性。测得样品B70在780nm处的三阶非线性折射率n2和非线性吸收系数β分别为：n2=6．017×10^-12esu和β=0．366cm／GW，样品为自聚焦材料。该样品的吸收相移和折射相移的比值K为0．19（K〈1），表明该样品可作为光限幅候选材料。A serial of Bismuth glasses with the composition of x Bi2O3-20B2O3-（80 - x ）SiO2 （Bx, x = 60,65,70 molar percent）glasses were prepared by the conventional melting method. The third-order nonlinear optical properties of glasses was investigated by Z-scan technique using femto-second Ti：Sapphire laser pluses. The values of n2 and β at 780 nm in 1370 sample are equal to 6. 017 × 10^-12 esu and 0. 366 cm/GW, respectively, and this kind of glass acts as a self-focusing medium, the twophoton absorption included. The ratio of nonlinear refraction to the absorption of the optical is 0.19, which is smaller than 1. It is a kind of promising material with a good optical limiting performance.

关 键 词：非线性光学 Z扫描 BI2O3-B2O3-SIO2玻璃 

分 类 号：TQ171.1[化学工程—玻璃工业]