Megawatt solitons generated above 2000  nm in Bragg fibers

Solitonic effects, including multi-solitonic fission and subsequent self-frequency shift, are used to tailor ultrashort (sub-100 fs) pulses with carrier wavelength broadly tunable in spectral regions between fixed laser lines. Although high-energy pulses can be obtained in stiff waveguides, the bene...

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Bibliographic Details
Published in:Optics letters 2019-06, Vol.44 (11), p.2713
Main Authors: Delahaye, H., Granger, G., Gaponov, D., Lavoute, L., Aleshkina, S., Salganskii, M., Hideur, A., Likhachev, M., Février, S.
Format: Article
Language:English
Subjects:
Bend radius
Bends
Doped fibers
Engineering Sciences
Frequency shift
Harmonic generations
Optics
Photonic
Silicon dioxide
Solitary waves
Thulium
Waveguides
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Summary:Solitonic effects, including multi-solitonic fission and subsequent self-frequency shift, are used to tailor ultrashort (sub-100 fs) pulses with carrier wavelength broadly tunable in spectral regions between fixed laser lines. Although high-energy pulses can be obtained in stiff waveguides, the benefit of pulse delivery through bends is lost. Here, we report on the generation, sustained propagation, and large frequency shift of megawatt-class pulses in all-silica antiresonant fibers with ultra-large mode area. We designed and fabricated a flexible fiber with a 2710  μm2 effective mode area and a 10 cm critical bend radius. When pumped by a sub-picosecond thulium-doped fiber-based chirped pulse amplifier, the fiber delivers 90 fs pulses at 2220 nm with a 2.8 MW peak power. The system might be used to drive high-order harmonic generation in solids.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.44.002713