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Bi_2O_3-B_2O_3-Ga_2O_3玻璃的三阶非线性研究 被引量:3

Third-Order Nonlinearity Investigation in Bi_2O_3-B_2O_3-Ga_2O_3 Glasses
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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.
出处 《光学学报》 EI CAS CSCD 北大核心 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
关键词 光学材料 铋酸盐玻璃 三阶非线性 Z扫描 optical materials bismuth glasses third-order nonlinearity Z-scan
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