超快激光在复杂大气环境中传输的中红外波谱特性

摘要：

利用大气分层模型，通过仿真计算研究了强飞秒激光脉冲在复杂大气环境条件下，在不同位置处激发的中红外波谱特性,结果表明，颗粒物浓度的增加对光丝特性和波谱特性的影响都比较小.然而，当激光在散射介质中成丝传输时，光束的多次聚焦散焦使得光丝保持高强度稳定传输.这是超连续波谱展宽至中红外波段的关键因素，即使在散射较强的降雨环境中，也可通过增加激光脉冲输人功率来实现中红外波谱的展宽.此外，光丝的稳定传输可以有效地抑制大气湍流的扰动，减小大气湍流对中红外波谱特性的影响.这为复杂大气条件下利用中红外波谱远程探测高空中的大气污染物成分提供了重要的理论基础.

By using the model of atmospheric stratification, we simulated that the mid-infrared spectral characteristics are generated by intense femtosecond laser pulses at different altitudes under complex atmospheric conditions. The results show that the increase of particle concentration has a relatively litle effect on the characteristics of filament and spectrum. However,when the laser pulses are transmitted in scattering media, multiple focusing and defocusing of the laser pulse makes the fila-ment maintain a stable transmission with high-intensity, which is a key factor in broadening the supercontinuum spectrum to the mid-infrared band. Even in a rainfall environment with strong scattering, the broadening of the mid-infrared spectrum can be achieved by increasing the laser pulse input power. Moreover, the stable transmission of the filament can effectively suppress the perturbation of atmospheric turbulence and reduce the influence of atmospheric turbulence on the characteristics of the midinfrared spectrum. The study provides an important theoretical basis for remotely detecting the components o atmospheric pollutants in high altitude using mid-infrared spectroscopy under complex atmospheric conditions.

作者：

冯志芳,赵敏,刘勋,韩祎伟,李维,舒小芳,刘渊

Feng Zhifang, Zhao Min, Liu Xun, Han Yiwei, Li Wei, Shu Xiaofang, Liu Yuan

机构地区：

太原科技大学应用科学学院；山西省光场调控与融合应用技术创新中心；中国空间技术研究院北京空间机电研究所；北京量子信息科学研究院

引用本文：

冯志芳，赵敏，刘勋等。超快激光在复杂大气环境中传输的中红外波谱特性[J].河南师范大学学报(自然科学),2026,54(3):108-113. (Feng Zhifang, Zhao Min, Liu Xun,et al. The mid-infrared spectral characteristics of ultrafast laser pulse propagation in complex atmospheric environments[J].Journal of Henan Normal University(Natural Science Edition),2026,54(3) :108-113.DOI:10.16366/j.cnki.1000-2367.2025.01.07.0003.)

基金：

国家社会科学基金；山西省基础研究计划青年项目

关键词：

散射介质；大气湍流；光丝特性；波谱特性

scattering medium; atmospheric turbulence; light filament property; spectral property

分类号：

O437

超快激光在复杂大气环境中传输的中红外波谱特性.pdf