Ge20Sb5Se75玻璃的三阶非线性吸收系数研究  

Investigation of Nonlinear Absorption Coefficient in Ge20Sb5Se75 Glass

作　　者：沈祥[1,2] 聂秋华[1,2] 徐铁峰[2] 戴世勋[2] 王训四[2] 陈燕飞[2] 陈飞飞[2] 

机构地区：[1]上海技术物理研究所,上海200083 [2]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185-187,共3页Journal of Wuhan University of Technology

基　　金：国家自然科学基金（60677015）,浙江省教育厅项目（20061664）和宁波市自然科学基金项目（2006A610020）.

摘　　要：依据Z-扫描技术，测试了Ge20Sb5Se75玻璃样品在开孔条件下的透过率曲线，根据实验结果拟合了样品的三阶非线性吸收系数β，并比较了不同测试波长下硫系玻璃的β值。结果表明：当激发辐射能量hω与接近光学能隙Eg的比值小于0．5时，β数值变化不大，当比值大于0．5时，β数值有呈e指数增加的趋势。The transmission of Ge20Sb5Se75 glass has been measured by using Z-scan technique with open aperture. Nonlinear absorption coefficient, β has been calculated according to the normalized transmission, and the values of β were compared with different measured wavelength. Results indicate that β remains unchanged when the ratio of hω/Eg is below 0.5, however, β is exponential increase when the ratio of hω/Eg is up 0.5.

关 键 词：Z-扫描 硫系玻璃 非线性吸收系数 

分 类 号：TQ171.1[化学工程—玻璃工业]