Coherent free-electron light sources  

作　　者：Dongdong Zhang Yushan Zeng Ye Tian Ruxin Li 

机构地区：[1]State Key Laboratbry of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Sciene,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Scienoes,Shanghai,China [2]School of Physioal Science and Technology,ShanghaTech University,Shanghai,China

出　　处：《Photonics Insights》2023年第3期46-74,共29页光子学评论（英文）

基　　金：supported by the Shanghai Pilot Program for Basic Research-Chinese Academy of Sciences,ShanghaiBranch;National Natural Science Foundation of China(Nos.12104471,U226720057,and 62105346);Key Research Program of Frontier Sciences,Chinese Academy of Sciences;Youth Innovation Promotion Association of Chinese Academy of Sciences;CAS Project for Young Scientists in Basic Research(No.YSBRO60);Shanghai Sailing Program(No.21YF1453900).

摘　　要：Free-electron light sources feature extraordinary luminosity,directionality,and coherence,which has enabled significant scientific progress in fields including physics,chemistry,and biology.The next generation of light sources has aimed at compact radiation sources driven by free electrons,with the advantages of reduction in both space and cost.With the rapid development of ultra-intense and ultrashort lasers,great effort has been devoted to the quest for compact free-electron lasers(FELs).This review focuses on the current efforts and advancements in the development of compact FELs,with a particular emphasis on two notable paths:the development of compact accelerators and the construction of micro undulators based on innovative materials/structures or optical modulation of electrons.In addition,the physical essence of inverse Compton scattering is discussed,which offers remarkable capability to develop an optical undulator with a spatial period that matches the optical wavelength.Recent scientific developments and future directions for miniaturized and integrated free-electron coherent light sources are also reviewed.In the future,the prospect of generating ultrashort electron pulses will provide fascinating means of producing superradiant radiation,promising high brilliance and coherence even on a micro scale using optical micro undulators.

关 键 词：free-electron laser stimulated emission micro undulator coherent free-electron light source 

分 类 号：O43[机械工程—光学工程]