Kilowatt-Level Monolithic All-Fiber Laser Oscillator

被引：1
|
作者：
Li Hao [1 ,2 ]
Li Hongye [1 ,2 ]
Li Zhixian [1 ,2 ]
Tian Xin [1 ,2 ]
Wang Meng [1 ,2 ,3 ]
Rao Binyu [1 ,2 ]
Wu Baiyi [1 ,2 ,3 ]
Xi Xiaoming [1 ,2 ,3 ]
Chen Zilun [1 ,2 ,3 ]
Wang Zefeng [1 ,2 ,3 ]
Chen Jinbao [1 ,2 ,3 ]
机构：
[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Hunan, Peoples R China
[2] State Key Lab Pulsed Power Laser Technol, Changsha 410073, Hunan, Peoples R China
[3] Hunan Prov Key Lab High Energy Laser Technol, Changsha 410073, Hunan, Peoples R China
来源：
ACTA OPTICA SINICA | 2022年 / 42卷 / 23期
关键词：
fiber optics; fiber oscillator; fiber Bragg grating; side-pump coupler; high-power fiber laser; BRAGG GRATINGS;
D O I：
10.3788/AOS202242.2306002
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Based on the femtosecond laser inscribing technology and side-pump coupling technology, a kilowatt-level monolithic all-fiber laser oscillator without fusion splice in the main optical path is obtained. In addition, a pair of fiber Bragg gratings are written in a large-mode-area and double-cladding ytterbium-doped fiber by combining femtosecond laser and phase mask, so as to form a resonant cavity. Meanwhile, two side-pump couplers are fabricated by tapered-fused technology in the same ytterbium-doped fiber. With a semiconductor laser of 976 nm as the pump source, the maximum output power of 1052 W is obtained at a center wavelength of 1070 nm, and the optical-optical conversion efficiency and the beam quality factor M-2 are about 73% and 1.8, respectively. A compact and stable monolithic fiber laser oscillator system is presented , and its potential in realizing laser output with high power and high beam quality is demonstrated , which is of great value to the development and application of high-power fiber lasers.
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页数：6
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