Ge-Sb-Se硫系玻璃光纤的CO_2激光导能特性  

CO_2 Laser Power Delivery Characteristics of Ge-Sb-Se Glass Fibers

作　　者：严春阳[1,2] 吴丽华[1,2] 戴世勋[1,2] 张培晴[1,2] 刘自军[1,2] 王训四[1,2] 

机构地区：[1]宁波大学高等技术研究院红外材料及器件实验室,浙江宁波315211 [2]浙江省红外探测材料及器件重点实验室,浙江宁波315211

出　　处：《中国激光》2016年第8期192-196,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(61435009;61377099);宁波大学王宽诚幸福基金

摘　　要：制备了低杂质吸收的Ge_(20)Sb_(15)Se_(65)硫系玻璃并拉制了不同直径的光纤,进行了10.6μm CO_2激光导能实验。实验结果表明,制备的Ge20Sb15Se65硫系玻璃具有良好的抗析晶特性,在5~11μm波段透过率约为64%。在高功率CO_2激光作用下,Ge20Sb15Se65玻璃光纤端面会出现熔融损伤,原因在于光吸收产生的热堆积导致光纤端面温度快速升高。当光纤直径为800μm、长度为430mm、输入端功率为5267mW时,输出功率最大,为809mW,输出功率密度为161 W/cm^2,传输效率为16%,实验结果与理论计算结果基本相符。Ge20Sb15Se65 chalcogenide glasses with low impurity absorption are prepared and fibers with different diameters are drawn. The power delivery characteristics of CO2 laser （10.6 μm） through these fibers are experimentally investigated. The experiment results show that the glass prepared has good anti-crystallization property, and the infrared transmission in the 5-11 μm band is about 64%. Under high power CO2, heat accumulation caused by the light absorption makes the temperature on the fiber end surface rise rapidly, and the melting damage is observed on the end surface of the Ge20Sb15Se65 glass fiber. The maximum output power of 809 mW with the input power of 5267 mW is obtained by using the fiber with a diameter of 800 μm. The output power density is 161 W/cm2 and the delivery efficiency is 16%. The experimental results are basically consistent with the theoretical calculation results.

关 键 词：材料 Ge—Sb—Se硫系玻璃 光纤导能特性 CO2激光 激光损伤 

分 类 号：TN249[电子电信—物理电子学]