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.

引用

页数：5

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