中国激光, 2020, 47 (5): 0500005, 网络出版: 2020-05-12
空气激光:强场新效应和远程探测新技术 下载: 2965次内封面文章特邀综述
Air Lasing: Novel Effects in Strong Laser Fields and New Technology in Remote Sensing
摘要
空气激光是以空气为增益介质产生的相干辐射,具有高准直度、高相干性、高强度以及自由空间传输等优点,为远程探测提供了全新的技术途径。同时,空气激光是强场超快激光与空气中的原子分子相互作用的结果,蕴含了新颖而丰富的强场物理效应。综述了空气激光近年来的主要研究进展。首先介绍了三类空气激光的产生途径及基本特征,然后从氮气离子激光的增益机制以及量子相干性两个层面阐述了空气激光所蕴含的新物理效应,并讨论了空气激光在远程探测中的应用,最后总结了空气激光研究的意义,展望了该方向面临的机遇与挑战。
Abstract
Air lasing refers to the coherent emission produced with air as the gain medium. Air lasing has numerous advantages such as high directionality, high coherence, high intensity, and free-space propagation. Therefore, air lasing provides a novel pathway for remote sensing. Air lasing, which is generated by the interaction between a strong ultrafast laser and atoms or molecules in air, includes many new strong-field effects. In this paper, we reviewed the major advances in air lasing in recent years. First, generation methods and basic characteristics of three types of air lasing were introduced. Next, new physical effects involved in air lasing were revealed based on two aspects, gain mechanism of molecular nitrogen ion lasing and quantum coherence. Moreover, applications of air lasing in remote sensing were discussed. Conclusively, the research significance of air lasing was summarized, and the opportunities and challenges in this topic were highlighted.
姚金平, 程亚. 空气激光:强场新效应和远程探测新技术[J]. 中国激光, 2020, 47(5): 0500005. Jinping Yao, Ya Cheng. Air Lasing: Novel Effects in Strong Laser Fields and New Technology in Remote Sensing[J]. Chinese Journal of Lasers, 2020, 47(5): 0500005.