Research Progress of Ytterbium-Doped Fiber-Solid High-Power Ultrashort Pulse Amplification

Yan, 徐岩 Xu; Zhigang, 彭志刚 Peng; Zhaochen, 程昭晨 Cheng; Yuhang, 石宇航 Shi; Beibei, 王贝贝 Wang; Pu, 王璞 Wang

doi:10.3788/cjl202148.0501003

中国激光

2021

DOI: 10.3788/cjl202148.0501003

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Research Progress of Ytterbium-Doped Fiber-Solid High-Power Ultrashort Pulse Amplification

徐岩 Xu Yan¹,

彭志刚 Peng Zhigang²,

程昭晨 Cheng Zhaochen³

et al.

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Cited by 5 publications

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An All-Fiberized Chirped Pulse Amplification System Based on Chirped Fiber Bragg Grating Stretcher and Compressor

Wang¹,

Li²,

Xu³

et al. 2022

Chinese Phys. Lett.

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We report an all-fiberized chirped pulse amplification system without any bulk devices. The stretcher and compressor are chirped fiber Bragg gratings inscribed in a 6/125 μm single-mode fiber and a 30/250 μm large-mode-area fiber. The fabrication system of chirped fiber Bragg gratings was designed and built by ourselves. The width of the linear exposure spot was controlled according to the different fiber sizes to improve the fabrication quality, and the parameters of chirped fiber Bragg gratings were fine-tuned during the fabrication to achieve the overall system’s spectral matching. Two fiber circulators with the same fiber sizes as the chirped fiber Bragg gratings were employed to auxiliarily achieve the pulse stretching and compression. The dispersion accumulations provided by the stretcher and compressor are 129.8 ps and 90.8 ps. The power amplifiers were composed of the two-stage 10/130 μm fiber pre-amplifier and the 30/250 μm fiber main amplifier. The proposed chirped pulse amplification system with no spatial light is the true sense of an all-fiberized chirped pulse amplification structure and shows the main trend in development of ultrashort pulse fiber lasers.

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An All-Fiberized Chirped Pulse Amplification System Based on Chirped Fiber Bragg Grating Stretcher and Compressor

Wang¹,

Li²,

Xu³

et al. 2022

Chinese Phys. Lett.

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Highly fluorine and ytterbium doped polarization maintaining large mode area photonic crystal fiber via the sol-gel process

Wang

Shao

et al. 2021

Opt. Express

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Highly Yb-doped silica glass with low refractive index for fabrication of Yb-doped large-mode-area photonic crystal fiber (LMA PCF) is in favor of decreasing fiber length and thus increasing the threshold of nonlinear effects in pulse laser amplification. Accordingly, fluorine incorporation in highly Yb-doped silica glass is vitally important to compensate the sharp increase in refractive index caused by ytterbium and aluminum ions. In this work, the fluorine doping concentration in Yb/Al/P/F co-doped silica glass was significantly improved by a modified sol-gel method combined with high temperature sintering. The effects of fluorine doping on glass structure have been investigated in details by Raman spectra, nuclear magnetic resonance (NMR) and advanced pulse electron paramagnetic resonance (EPR) measurements. The incorporation of fluorine yields Si-F bonds and Yb-F bonds formation and leads to the mild change in spectroscopic properties. An optimized silica core glass rod with high Yb (0.77 wt.%) and fluorine (0.8 wt.%) doping concentration, low refractive index and acceptable optical quality was prepared. Based on the highly fluorine and ytterbium doped silica core glass, a polarization maintaining (PM) photonic crystal fiber with 40 µm core was prepared and the pump absorption coefficient at 976 nm was ∼6.5 dB/m. An average amplified power of 103 W was achieved from a 2-m-long PCF with the bend diameter of 23 cm. The slope efficiency (with respect to pump power) was 52% with laser beam quality factor M2 of 1.46.

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基于泵浦分束的波长可调谐1 μm超短脉冲光纤激光器

Xu Minghang,

Liu Kun,

Zhao Hong

et al. 2023

中国激光

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Research Progress of Ytterbium-Doped Fiber-Solid High-Power Ultrashort Pulse Amplification

Cited by 5 publications

References 0 publications

An All-Fiberized Chirped Pulse Amplification System Based on Chirped Fiber Bragg Grating Stretcher and Compressor

An All-Fiberized Chirped Pulse Amplification System Based on Chirped Fiber Bragg Grating Stretcher and Compressor

Highly fluorine and ytterbium doped polarization maintaining large mode area photonic crystal fiber via the sol-gel process

基于泵浦分束的波长可调谐1 μm超短脉冲光纤激光器

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