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Ge-Sb-S硫系玻璃的飞秒激光诱导损伤研究

Femtosecond Laser-Induced Damage on Ge-Sb-S Chalcogenide Glass

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摘要

用超短脉冲抽运高非线性硫系玻璃光波导是产生宽带中红外超连续谱的重要途径,超连续谱的输出平均功率主要受材料激光损伤阈值(LDT)的限制。为了阐明硫系玻璃的LDT与玻璃化学组成的关系,以及不同重复频率超短脉冲辐照下对应的损伤机理,以脉冲宽度为216 fs、中心波长为1030 nm、重复频率为1~1000 kHz的激光为辐照源,对Ge-Sb-S硫系玻璃进行激光辐照,研究了玻璃的激光损伤特性。结果表明:玻璃的LDT随辐照源重复频率的增大而减小;具有较高平均键能的玻璃表现出了较高的LDT,化学计量配比的玻璃具有最优的抗激光损伤性能;当辐照脉冲的重复频率在10 kHz以下时,损伤主要由雪崩电离引起;相比之下,当辐照脉冲的重复频率超过10 kHz时,热积累变得显著,会促进玻璃的损伤。

Abstract

The exposure of high-nonlinearity chalcogenide glass fibers to ultrashort pulses is an important approach for achieving broadband mid-infrared supercontinuum (SC). The average output power of a generated SC is mainly limited by the laser damage threshold (LDT) of the material. In this work, the laser damage characteristics of the germanium-antimony-sulfur (Ge-Sb-S) chalcogenide glass are studied using a laser with a pulse width of 216 fs, a central wavelength of 1030 nm, and a repetition rate of 1-1000 kHz to elucidate the composition dependence of the LDT of the chalcogenide glass as well as the mechanisms of damage to the material exposed to irradiation pulses with different repetition rates. Results show that the LDT of the Ge-Sb-S glass decreases with increasing repetition rate of the irradiation pulse. The glass with high average bond energy is found to have a high LDT, and its stoichiometric composition exhibits optimal resistance to optical damage. When the repetition rate of laser irradiation pulse is less than 10 kHz, the glass is observed to be mainly damaged by avalanche ionization. In contrast, thermal accumulation is the dominant factor promoting damage when the repetition rate of the irradiation pulse exceeds 10 kHz.

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中图分类号:TN213

DOI:10.3788/AOS201939.1016001

所属栏目:材料

基金项目:国家重点研发专项、国家自然科学基金、江苏高校优势学科建设工程、江苏省先进激光技术与新兴产业协同创新中心资助项目;

收稿日期:2019-05-10

修改稿日期:2019-06-03

网络出版日期:2019-10-01

作者单位    点击查看

李铜铜:江苏师范大学物理与电子工程学院, 江苏省先进激光材料与器件重点实验室, 江苏 徐州 221116
张鸣杰:江苏师范大学物理与电子工程学院, 江苏省先进激光材料与器件重点实验室, 江苏 徐州 221116
田康振:江苏师范大学物理与电子工程学院, 江苏省先进激光材料与器件重点实验室, 江苏 徐州 221116
张翔:苏州大学光电科学与工程学院, 苏州纳米科技协同创新中心, 江苏 苏州215006江苏省先进光学制造技术重点实验室和教育部现代光学技术重点实验室, 江苏 苏州215006
袁孝:苏州大学光电科学与工程学院, 苏州纳米科技协同创新中心, 江苏 苏州215006江苏省先进光学制造技术重点实验室和教育部现代光学技术重点实验室, 江苏 苏州215006
杨安平:江苏师范大学物理与电子工程学院, 江苏省先进激光材料与器件重点实验室, 江苏 徐州 221116
杨志勇:江苏师范大学物理与电子工程学院, 江苏省先进激光材料与器件重点实验室, 江苏 徐州 221116苏州大学光电科学与工程学院, 苏州纳米科技协同创新中心, 江苏 苏州215006江苏省先进光学制造技术重点实验室和教育部现代光学技术重点实验室, 江苏 苏州215006

联系人作者:杨志勇(yangzhiyong@jsnu.edu.cn)

备注:国家重点研发专项、国家自然科学基金、江苏高校优势学科建设工程、江苏省先进激光技术与新兴产业协同创新中心资助项目;

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引用该论文

Li Tongtong,Zhang Mingjie,Tian Kangzhen,Zhang Xiang,Yuan Xiao,Yang Anping,Yang Zhiyong. Femtosecond Laser-Induced Damage on Ge-Sb-S Chalcogenide Glass[J]. Acta Optica Sinica, 2019, 39(10): 1016001

李铜铜,张鸣杰,田康振,张翔,袁孝,杨安平,杨志勇. Ge-Sb-S硫系玻璃的飞秒激光诱导损伤研究[J]. 光学学报, 2019, 39(10): 1016001

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