The 266-nm ultraviolet-beam generation of all-fiberized super-large-mode-area narrow-linewidth nanosecond amplifier with tunable pulse width and repetition rate  

作　　者：Shun Li Ping-Xue Li Min Yang Ke-Xin Yu Yun-Chen Zhu Xue-Yan Dong Chuan-Fei Yao 李舜;李平雪;杨敏;于可新;朱云晨;董雪岩;姚传飞(Institute of Ultrashort Pulsed Laser and Application,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]Institute of Ultrashort Pulsed Laser and Application,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China

出　　处：《Chinese Physics B》2022年第3期292-298,共7页中国物理B（英文版）

基　　金：Project supported by the Key Program of Beijing Municipal Natural Science Foundation, China (Grant No. KZ201910005006);the National Nature Science Foundation of China (Grant No. 62005004);the Natural Science Foundation of Beijing Municipality, China (Grant No. 4204091);the National Science Foundation for Postdoctor Scientists of China (Grant No. 212423)。

摘　　要：We report on a compact, stable, all-fiberized narrow-linewidth(0.045 nm) pulsed laser source emitting laser beam with a wavelength of 266 nm, and tunable pulse width and repetition rate. The system is based on all-fiberized nanosecond amplifier architecture, which consists of Yb-doped fiber preamplifiers and a super-large-mode-area Yb-doped fiber power amplifier. The fiber amplifier with a core of 50 μm is used to raise the threshold of the stimulated Brillouin scattering(SBS) effect and to obtain high output power and single pulse energy. Using lithium triborate(LBO) crystal and betabarium borate(BBO) crystal for realizing the second-harmonic generation(SHG) and fourth-harmonic generation(FHG),we achieve 17 μJ(1.73 W) and 0.66 μJ(66 mW), respectively, at wavelengths of 532 nm and 266 nm and a repetition rate of 100 kHz with pulse width of 4 ns. This source has great potential applications in fluorescence research and solar-blind ultraviolet optical communication.

关 键 词：nanosecond all-fiber amplifier narrow-linewidth ultraviolet beam generation tunable pulse width and repetition rate 

分 类 号：TN722[电子电信—电路与系统]