激光脉宽对熔融石英中超连续光谱的影响  

Influence of pulse duration on the supercontinuum generation from femtosecond laser filamentation in fused silica

作　　者：许梦宁 展林弟 奚婷婷 XU Mengning;ZHAN Lindi;XI Tingting(School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 101408,China)

机构地区：[1]中国科学院大学物理科学学院,北京101408

出　　处：《中国科学院大学学报（中英文）》2021年第1期49-53,共5页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金(11774038,11874056,11474039)资助。

摘　　要：理论研究飞秒激光脉宽、啁啾和初始光谱对其在熔融石英中成丝产生的超连续光谱的影响。结果表明:在固定能量下,脉宽越大,蓝移截止波长越长,光谱强度越低。对脉宽大于150 fs的激光,负啁啾脉冲比无啁啾和正啁啾脉冲产生的蓝移光谱强度更大。The influences of the pulse duration,chirp,and initial spectrum of the femtosecond laser on the supercontinuum generated in fused silica have been investigated theoretically.Results show that,with the increase of the pulse duration,the cut-off wavelength of the blue-extension becomes longer and the spectral intensity becomes lower at the constant energy.For the laser with pulse duration larger than 150 fs,the spectral intensity of the blue-extension generated by the negatively chirped pulse is higher than those generated by the freely-chirped pulse and the positively chirped pulse.

关 键 词：飞秒激光脉宽 熔融石英 啁啾脉冲 超连续光谱 

分 类 号：O561.4[理学—原子与分子物理]