The 266-nm ultraviolet-beam generation of all-fiberized super-large-mode-area narrow-linewidth nanosecond amplifier with tunable pulse width and repetition rate
Shun Li(李舜), Ping-Xue Li(李平雪)†, Min Yang(杨敏), Ke-Xin Yu(于可新), Yun-Chen Zhu(朱云晨), Xue-Yan Dong(董雪岩), and Chuan-Fei Yao(姚传飞)
Institute of Ultrashort Pulsed Laser and Application, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
Abstract 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 μ 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 beta-barium 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.
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
Fund: 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), and the National Science Foundation for Postdoctor Scientists of China (Grant No. 212423).
Corresponding Authors:
Ping-Xue Li
E-mail: pxli@bjut.edu.cn
Cite this article:
Shun Li(李舜), Ping-Xue Li(李平雪), Min Yang(杨敏), Ke-Xin Yu(于可新), Yun-Chen Zhu(朱云晨), Xue-Yan Dong(董雪岩), and Chuan-Fei Yao(姚传飞) The 266-nm ultraviolet-beam generation of all-fiberized super-large-mode-area narrow-linewidth nanosecond amplifier with tunable pulse width and repetition rate 2022 Chin. Phys. B 31 034207
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