10 kW tandem pumping fiber amplifier with good beam quality based on tapered ytterbium-doped fiber

被引：13

作者：

Wang, Chongwei ^{[1
,2
]}

Xiao, Hu ^{[1
,2
]}

Xi, Xiaoming ^{[1
,2
]}

Liu, Wei ^{[1
,2
]}

Li, Ruixian ^{[1
]}

Pan, Zhiyong ^{[1
,2
]}

Yang, Huan ^{[1
,2
]}

Yan, Zhiping ^{[1
,2
]}

Chen, Zilun ^{[1
,2
]}

Huang, Liangjin ^{[1
,2
]}

Wang, Meng ^{[1
,2
]}

Yang, Baolai ^{[1
,2
]}

Wang, Xiaolin ^{[1
,2
]}

Ma, Pengfei ^{[1
,2
]}

Wang, Zefeng ^{[1
,2
]}

机构：

[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China

[2] Natl Univ Def Technol, Nanhu Laser Lab, Changsha 410073, Peoples R China

来源：

OPTICS EXPRESS | 2023年 / 31卷 / 24期

基金：

中国国家自然科学基金;

关键词：

PHOTONIC BANDGAP FIBER; DOUBLE-CLAD FIBER; MONOLITHIC FIBER; EFFECTIVE AREA; POWER; LASER;

D O I：

10.1364/OE.507105

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we established a high power tandem pumped fiber amplifier based on tapered ytterbium-doped fiber (TYDF). The TYDF is developed in-house with a core/inner cladding diameter of 30/250 mu m at the small-core region and 48/400 mu m at the large-core region. The key parameters of the amplifier in a co-pumped and counter-pumped configuration are experimentally investigated, such as slope efficiency, stimulated Raman scattering (SRS) threshold, and beam quality evolution. Up to 10.28 kW laser free of SRS or transverse mode instability is obtained from the counter-pumped amplifier, and the beam quality factor M2 is 2.29, which is significantly improved compared with the 48/400 mu m uniform YDF. To the best of our knowledge, this is the highest average output power achieved so far based on the TYDF. This work could provide a solution for balancing the SRS suppression and high order modes control in high power tandem pumped YDF lasers. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

引用

页码：40980 / 40990

页数：11

共 49 条

[1] Impact of the central refractive index dip of fibers on high-power applications [J].