Mode-switchable femtosecond vortex lasers

被引：1
|
作者：
Zhou, Xiaoqian [1 ]
Cao, Xuehong [1 ]
Tong, Luyang [1 ]
Chen, Changdong [2 ]
Cai, Yangjian [1 ,3 ]
Zhao, Lina [1 ,3 ]
机构：
[1] Shandong Normal Univ, Coll Phys & Elect, Collaborat Innovat Ctr Light Manipulat & Applicat, Shandong Prov Key Lab Opt & Photon Device,Ctr Ligh, Jinan 250358, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 211100, Peoples R China
[3] East China Normal Univ, Joint Res Ctr Light Manipulat Sci & Photon Integra, Shanghai 200241, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2024年 / 22卷 / 12期
基金：
中国国家自然科学基金;
关键词：
ultrafast laser; vortex laser; solid-state laser; ORBITAL ANGULAR-MOMENTUM; LIGHT; BEAM; METASURFACE; GENERATION; VORTICES; LOCKING; PULSES;
D O I：
10.3788/COL202422.121405
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A mode-switchable femtosecond vortex laser is innovatively developed in a Yb:KGW-based resonator. The unique structure is designed to achieve a transition between different transverse modes. In a normal cavity, 416 fs TEM00 mode is obtained. With a 50 mu m defect spot mirror, the resonator delivers LG 0,1 mode with a pulse duration of 476 fs. Under off-axis pumping, LG 0,1 mode is switched to a two-vortex array. The pulse width of the two-vortex array is as short as 520 fs. The maximum output power is 401 mW with a pulse energy of 4.15 nJ. To the best of our knowledge, this is the first realization of a femtosecond vortex array from resonators.
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页数：5
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