Bi_2O_3-B_2O_3-Ga_2O_3玻璃的三阶非线性研究  

Third-Order Nonlinearity Investigation in Bi_2O_3-B_2O_3-Ga_2O_3 Glasses

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

机构地区：[1]宁波大学信息科学与工程学院 [2]中国人民解放军91428部队

出　　处：《光学学报》2010年第7期2060-2064,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60677015);浙江省科技厅面上重点科技攻关项目(2007C21122);宁波市自然科学基金(2006A610020);宁波大学王宽诚幸福基金资助课题

摘　　要：采用传统熔融淬冷法制备了4组高Bi2O3含量的Bi2O3-B2O3-Ga2O3玻璃样品。测试了样品的密度、折射率和透过光谱,并分析了它们和Ga2O3含量之间的关系,拟合了样品的线性折射率随波长的变化曲线。根据Z扫描实验原理,利用钛宝石飞秒激光器测量了800 nm波长下各个样品的三阶非线性折射率n2以及非线性吸收系数β。结果表明:随着Ga2O3含量的增加,样品的线性折射率n0和三阶非线性折射率n2也随之增加,线性折射率最大样品对应的n2和β分别为3.331×10-18m2/W和0.695 cm/GW,表明该系列玻璃样品是一种优良的三阶非线性光学基质材料。A series of glasses with high Bi2O3 content of Bi2O3-B2O3-Ga2O3 ternary system were chosen and prepared by the conventional melt quenching methods.The densities,linear refractive indexes n0 and transmittance spectra of samples,and their relation with Ga2O3 content were measured.The third-order nonlinear-index coefficient n2 and the nonlinear Absorption coefficient β of glasses were investigated at 800 nm by Z-scan technique using Ti：sapphire femto-second laser pluses.The conclusions were as follows： The values of n0 and n2 in glasses increase with increasing the Ga2O3 content.The values of n2 and β at 800 nm in the sample which had the largest refractive index in all samples are equal to 3.331×10-18 m2/W and 0.695 cm/GW,respectively.All the results show that these glasses are potential materials in the application to third-order nonlinear optical field.

关 键 词：光学材料 铋酸盐玻璃 三阶非线性 Z扫描 

分 类 号：TQ171[化学工程—玻璃工业]