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题名	Ultrafast Flat-Top Beam Emission with an All-Fiber Multimode Laser
作者	Lou，Yajun; Ge，Boyuan; Gou，Silin; Wang，Anshuang; Cai，Yue; Zhang，Xinhai
通讯作者	Zhang，Xinhai
发表日期	2024-05-15
DOI	10.1021/acsphotonics.3c01858
发表期刊	ACS Photonics 影响因子和分区
EISSN	2330-4022
卷号	11 期号:5页码:1901-1908
摘要	Flat-top beams can eliminate the adverse effects of traditional Gaussian beams due to an uneven energy distribution. It is widely used in laser processing, image processing, and biomedical fields. The generation of pulsed flat-top beams using fiber lasers has gradually become a hot research topic in recent years. In this work, we propose an effective strategy to directly generate ultrafast flat-top beams with an all-fiber multimode laser without additional beam shaping. Utilizing the inherent characteristics of the multimode fiber, misalignment splicing of fibers, and tapered fibers in the cavity, we experimentally realize ultrashort pulses with flat-top beam shape through spatiotemporal mode-locking (STML). Numerical simulations based on the generalized multimode nonlinear Schrödinger equation further confirm that the flat-top beam is due to the coherent superposition of different transverse modes. To the best of our knowledge, this is the first time that the picosecond-level pulses with a flat-top beam shape are experimentally realized in all-fiber lasers. This work is of great significance for the development of ultrafast flat-top beams and also helps to broaden the applications of flat-top beams and multimode fiber lasers.
关键词	all-fiber laser spatiotemporal mode-locking ultrafast flat-top beam
相关链接	[Scopus记录]
语种	英语
学校署名	第一 ; 通讯
Scopus记录号	2-s2.0-85190166614
来源库	Scopus
引用统计
成果类型	期刊论文
条目标识符	http://kc.sustech.edu.cn/handle/2SGJ60CL/761128
专题	工学院_电子与电气工程系
作者单位	Department of Electrical & Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
第一作者单位	电子与电气工程系
通讯作者单位	电子与电气工程系
第一作者的第一单位	电子与电气工程系
推荐引用方式 GB/T 7714	Lou，Yajun,Ge，Boyuan,Gou，Silin,et al. Ultrafast Flat-Top Beam Emission with an All-Fiber Multimode Laser[J]. ACS Photonics,2024,11(5):1901-1908.
APA	Lou，Yajun,Ge，Boyuan,Gou，Silin,Wang，Anshuang,Cai，Yue,&Zhang，Xinhai.(2024).Ultrafast Flat-Top Beam Emission with an All-Fiber Multimode Laser.ACS Photonics,11(5),1901-1908.
MLA	Lou，Yajun,et al."Ultrafast Flat-Top Beam Emission with an All-Fiber Multimode Laser".ACS Photonics 11.5(2024):1901-1908.