Ge-As-Se-Te硫系玻璃的飞秒激光损伤特性  

Femtosecond laser damage characteristics of Ge-As-Se-Te chalcogenide glass

作　　者：周伟杰 马文强 李娆 褚珞耀 宋宝安[1,2] 戴世勋 徐铁峰[1,3] 张培晴 Zhou Weijie;Ma Wenqiang;Li Rao;Chu Geyao;Song Baoan;Dai Shixun;Xu Tiefeng;Zhang Peiqing(Laboratory of Infrared Materials and Devices,Faculty of Electrical and Engineering and Computer Science,Ningbo University,Ningbo 315211,China;Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province,Ningbo 315211,China;Ningbo Institute of Oceanography,Ningbo 315832,China)

机构地区：[1]宁波大学信息科学与工程学院红外材料及器件实验室,浙江宁波315211 [2]浙江省光电探测材料及器件重点实验室,浙江宁波315211 [3]宁波海洋研究院,浙江宁波315832

出　　处：《红外与激光工程》2022年第4期251-258,共8页Infrared and Laser Engineering

基　　金：国家自然科学基金(62075107,61935006,62090064);宁波大学王宽诚幸福基金。

摘　　要：Ge-As-Se-Te(GAST)硫族化物玻璃拥有超过20μm的超宽透射范围,是一种可应用于中红外(MIR)和远红外(FIR)波段的优良光学材料。通过熔融淬火法制备了Ge_(x)As_(40−x)Se_(40)Te_(20)(x=0、10、20、30、40 mol%)系列硫系玻璃,采用不同波长(800 nm,3μm和4μm)、功率和重复频率的飞秒激光辐照硫系玻璃,利用扫描电子显微镜(SEM)和拉曼光谱等手段研究了GAST的激光损伤特性。研究结果发现,Ge_(x)As_(40-x)Se_(40)Te_(20)玻璃的激光诱导损伤阈值(LIDT)随着样品中Ge含量的增加而增加,在800 nm下Ge_(30)As_(10)Se4_(0)Te_(20)玻璃的LIDT达到最高40.16 mJ/cm^(2)。随着飞秒激光波长增加,系列玻璃的LIDT也逐步增加,Ge_(30)As_(10)Se_(40)Te_(20)在4μm激光辐照下LIDT达到81.09 mJ/cm^(2)。此外,研究结果表明样品LIDT随着激光的脉冲辐照数量和重复率的增加将逐渐减小。Ge-As-Se-Te(GAST)chalcogenide glass has ultra-wide transmission range of more than 20μm,an excellent optical material that can be applied in mid-infrared(MIR)and far-infrared(FIR).In this work,the Ge_(x)As_(40-x)Se_(40)Te_(20)(x=0,10,20,30,40 mol%)chalcogenide glasses were prepared by the fusion quenching method,and the optical properties were tested.The sample glass was irradiated with femtosecond lasers of different wavelengths(800 nm,3μm and 4μm),different powers and repetition frequencies,and the laser damage characteristics of GAST were studied by scanning electron microscopy(SEM)and Raman spectroscopy.With the increase of Ge content,the laser-induced damage threshold(LIDT)at 800 nm reaches a maximum of 40.16 mJ/cm^(2)at Ge_(30)As_(10)Se4_(0)Te_(20).The LIDT increase with wavelength of the femtosecond laser and reaches 81.09 mJ/cm^(2)at 4μm.In addition,the results show that LIDT will gradually decrease as the number of laser pulses and the repetition rate increase.

关 键 词：硫系玻璃 飞秒激光 激光诱导损伤阈值 

分 类 号：TN213[电子电信—物理电子学]