435 W single-frequency all-fiber amplifier at 1064 nm based on cascaded hybrid active fibers

被引：14

作者：

Shi, Chaodu ^{[1
,2
]}

Fu, Shijie ^{[1
,2
]}

Deng, Xun ^{[1
,2
]}

Sheng, Quan ^{[1
,2
]}

Xu, Yang ^{[1
,2
]}

Fang, Qiang ^{[3
]}

Sun, Shuai ^{[1
,2
]}

Zhang, Junxiang ^{[1
,2
]}

Shi, Wei ^{[1
,2
]}

Yao, Jianquan ^{[1
,2
]}

机构：

[1] Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Inst Laser & Optoelect, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Key Lab Optoelect Informat Sci & Technol, Minist Educ, Tianjin 300072, Peoples R China

[3] HFB Photon Co Ltd, Weihai 264209, Shandong, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2022年 / 502卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Fiber laser; Single-frequency; High-power laser; Mode instability; Thermal load; Hybrid pumping; MODE; LASER; INSTABILITIES; NOISE;

D O I：

10.1016/j.optcom.2021.127428

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we report a high-power single-frequency all-fiber amplifier at 1064 nm based on cascaded hybrid active fibers. The cascaded gain fiber design, where a piece of active fiber with lower dopant concentration is spliced before the highly doped gain fiber, is proposed to effectively alleviate the thermal loads of high-power amplifier. By virtue of hybrid pump at 976 nm and 915 nm to increase the threshold of mode instability (MI) effect, an output power of 435 W is achieved from the Yb3+-doped fiber with large core diameter of 30 mu m. The beam quality is well maintained with a M2 of 1.40 even at the maximum laser power.

引用

页数：5

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