High-power 0.4-mJ picosecond CPA system based on an extra-large-mode-area triple-clad fiber

Wang, Beibei; Peng, Zhigang; Cheng, Zhaochen; Xu, Yonggang; Wang, Pu

doi:10.1364/oe.469197

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…On the contrary, fiber lasers have the advantages of flexible and compact system, high conversion efficiency, as well as excellent beam quality [7][8][9][10]. However, limited by the small mode field area and the long transmission length, the pulse energy and peak power scaling of ultrafast fiber lasers are significantly hampered by unwanted nonlinear effects [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Monolithic tapered Yb-doped fiber chirped pulse amplifier delivering 126 μJ and 207 MW femtosecond laser with near diffraction-limited beam quality

Wang,

Ren,

et al. 2023

Front. Optoelectron.

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In this work, a high-energy and high peak power chirped pulse amplification system with near diffraction-limited beam quality based on tapered confined-doped fiber (TCF) is experimentally demonstrated. The TCF has a core numerical aperture of 0.07 with core/cladding diameter of 35/250 µm at the thin end and 56/400 μm at the thick end. With a backward-pumping configuration, a maximum single pulse energy of 177.9 μJ at a repetition rate of 504 kHz is realized, corresponding to an average power of 89.7 W. Through partially compensating for the accumulated nonlinear phase during the amplification process via adjusting the high order dispersion of the stretching chirped fiber Bragg grating, the duration of the amplified pulse is compressed to 401 fs with a pulse energy of 126.3 μJ and a peak power of 207 MW, which to the best of our knowledge represents the highest peak power ever reported from a monolithic ultrafast fiber laser. At the highest energy, the polarization extinction ratio and the M2 factor were respectively measured to be ~ 19 dB and 1.20. In addition, the corresponding intensity noise properties as well as the short- and long-term stability were also examined, verifying a stable operation of the system. It is believed that the demonstrated laser source could find important applications in, for example, advanced manufacturing and photomedicine. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Monolithic tapered Yb-doped fiber chirped pulse amplifier delivering 126 μJ and 207 MW femtosecond laser with near diffraction-limited beam quality

Wang,

Ren,

et al. 2023

Front. Optoelectron.

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1200-W all polarization-maintaining fiber GHz-femtosecond-pulse laser with good beam quality

Xiu,

Fan,

Lin

et al. 2023

Opt. Express

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In this work, we demonstrate a 1200-W average power all polarization-maintaining (PM) fiber ultrafast laser system operating at 1.0 µm. In accordance with the numerical modeling, the PM fiber laser system is designed and it delivers linearly-polarized femtosecond pulses at a 1.39-GHz fundamental repetition rate, with a maximum output power of 1214 W — to the best of our knowledge, the highest average power from all PM fiber ultrafast laser at 1.0 µm to date. The pulse width can be compressed to ∼800 fs with a beam quality of M2 < 1.1. This kilowatt-class all PM fiber laser system is expected to open new potential for high energy pulse generation through temporal coherent combination and laser ablation using GHz burst fs laser.

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Single-mode regenerative amplification in multimode fiber

Haig,

Bender,

Eisenberg

et al. 2023

Optica

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The peak power performance of ultrafast fiber lasers scales with fiber mode area, but large fibers host multiple modes that are difficult to control. We demonstrate a technique for single-mode operation of highly multimode fiber based on regenerative amplification. This results in a short-pulse fiber source with, to our knowledge, an unprecedented combination of features: high gain (>55dB) with negligible amplified spontaneous emission, high pulse energy (>50µJ), good beam quality (M2≤1.3), and transform-limited (300 fs) pulses from a single amplification stage. We discuss peak intensity scaling to much higher levels and other opportunities for short-pulse generation in regenerative fiber amplifiers.

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High-power 0.4-mJ picosecond CPA system based on an extra-large-mode-area triple-clad fiber

Cited by 3 publications

References 40 publications

Monolithic tapered Yb-doped fiber chirped pulse amplifier delivering 126 μJ and 207 MW femtosecond laser with near diffraction-limited beam quality

Monolithic tapered Yb-doped fiber chirped pulse amplifier delivering 126 μJ and 207 MW femtosecond laser with near diffraction-limited beam quality

1200-W all polarization-maintaining fiber GHz-femtosecond-pulse laser with good beam quality

Single-mode regenerative amplification in multimode fiber

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