多横模激光器:从原理、实现到应用  

Multi⁃Transverse⁃Mode Lasers:from Fundamentals,Implementations to Applications

作　　者：王豪 吴佳蔚[1,2] 江骏杰 吴诗非 付星 柳强 Wang Hao;Wu Jiawei;Jiang Junjie;Wu Shifei;Fu Xing;Liu Qiang(Department of Precision Instrument,Tsinghua University,Beijing 100084,China;Key Laboratory Photonic Control Technology,Ministry of Education,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学精密仪器系,北京100084 [2]清华大学光子测控技术教育部重点实验室,北京100084

出　　处：《中国激光》2024年第17期1-16,共16页Chinese Journal of Lasers

摘　　要：多模激光器作为新兴的激光器,克服了单模光源的限制,能够同时支持大量的激光模式振荡输出,而且在很多场景中允许模间耦合关系的灵活控制,展现了更丰富的物理现象并为激光器应用开辟了新领域。从不同的光子自由度出发,近年来多模激光器取得了一系列创新进展,本综述围绕多横模激光器介绍了谐振腔的设计原理及其相应的调控技术,探讨了从单模激光到多模激光的过渡。文章重点阐述了五大类新颖的多横模激光器,并从原理出发深入探讨了这些非传统激光器的多样应用,为读者提供了一个关于激光器开发的全新角度,最后从模式数量、模式控制、模式应用等方面对多模激光器的未来发展进行了展望。Significance Lasers,or“light amplification by stimulated emission of radiation,”are one of the most important research areas in modern physics.The uniqueness of lasers lies in the multiple degrees of freedom(DoFs)of photons,including amplitude,frequency,orbital angular momentum,and polarization.Understanding and controlling these DoFs are central to laser applications.For a given photon’s DoF,we can define distinctive modes to distinguish different beam states.Gradually,our understanding of laser cavities has expanded,and laser control techniques have become more sophisticated,sparking interest in multimode lasers.Multimode lasers transcend the traditional limitation of single-mode operation,offering richer physical phenomena and expanding the applications of lasers.For example,when multiple longitudinal modes coexist in a resonant cavity and are correlated in phase,they lock in the frequency domain,producing ultrashort pulses(ranging from 10-12 to 10-15 s)in the time domain,which are valuable for scientific research and industrial applications.Similarly,multimode lasers in spatial DoFs have been garnering increasing interest,broadly bridging the fields of complex optics,wavefront shaping,optical simulators,computational imaging,and many-body physics.Progress Here,we review research progress on the recent designs and applications of multi-transverse-mode lasers,with a focus on solid-state lasers.We begin with a brief introduction to the frequency-degenerate cavities used for generating complex structured light(Fig.1),where stringent cavity boundary conditions must be satisfied.We place more emphasis on degenerate cavity lasers with a 4-F system within the resonators(Fig.2),which are particularly interesting because arbitrary-shapes transverse modes are naturally supported in such a setup.The discussion is then expanded to include random multimode lasers,chaotic microcavities,and photonic network lasers(Figs.3-5),which differ but share the same property of multimode lasing.Alongside explaining their basic pr

关 键 词：多模激光器 简并腔激光器 随机激光器 混沌微腔激光器 光子网络激光器 复杂激光 

分 类 号：O436[机械工程—光学工程]