掺Er^3＋的镉硅酸盐玻璃的光限幅特性  

Optical limiting property of Er^(3+)-doped cadmium silicate glasses

作　　者：宋昭远[1] 刘晓东[1] 陈月娥[1] 韩颖[1] 付剑[2] 冯志庆[3] 侯蓝田[1] 

机构地区：[1]燕山大学红外光纤与传感研究所,河北秦皇岛066004 [2]大连交通大学机械工程学院,辽宁大连116028 [3]大连民族学院光电子技术研究所,辽宁大连116600

出　　处：《功能材料》2008年第1期29-31,35,共4页Journal of Functional Materials

基　　金：国家重点基础研究发展计划(973计划)资助项目(2003CB314905);国家自然基金重点基金项目(60637010);辽宁省教育厅攻关计划资助项目(2004D254)

摘　　要：利用调Q纳秒Nd∶YAG激光脉冲,使用z扫描技术研究了掺Cd2+重金属硅酸盐基质玻璃及其掺Er3+玻璃的三阶非线性光学特性。发现基质玻璃具有负的三阶非线性折射系数和正的非线性吸收系数,而随着Er3+的掺入,反而具有正的三阶非线性折射系数和非线性吸收系数,属于自聚焦反饱和吸收型的光学介质。光限幅测量表明,掺Er3+玻璃在入射功率密度>154mW/mm2时,介质的吸收系数逐渐增加,激光透射率逐渐降低,且具有强于基质玻璃的光限幅效应。Cd^2＋-doped heavy metal silicate glass （matrix） and further Er^3＋-doped glass were prepared and their third-order optical nonlinearities are measured by the z-scan technique using nanosecond laser pulses at 532nm wavelength, and it is found that the matrix glass possesses a positive nonlinear refractive index and a positive nonlinear absorption efficiency, but a negative nonlinear refractive index and a positive nonlinear absorption efficiency are obtained in the further Er^3＋-doped glass. Subsequently, principal optical limiting experiment is performed on the further Er^3＋-doped glass, and it is found that when the incident power is increased to higher than 154mW/mm^2, its absorption rate becomes high correspondingly, i. e. , the transmitted power rate becomes gradually reduced, which shows it possess a better optical limiting effect than the matrix glass.

关 键 词：三阶光学非线性 光限幅 Z扫描 掺ER^3+ 玻璃 

分 类 号：O437[机械工程—光学工程]