High-energy multidimensional solitary states in hollow-core fibres

Safaei, Reza; Fan, Guangyu; Kwon, Oh-Sang; Légaré, Katherine; Lassonde, Philippe; Schmidt, Bruno E.; Ibrahim, Heide; Légaré, François

doi:10.1038/s41566-020-00699-2

Cited by 73 publications

(31 citation statements)

References 38 publications

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“…As the pulse undergoes compression, it becomes short enough to impulsively excite the Q-branch vibrational response of N2 (period 14.3 fs, frequency 69.9 THz), further broadening the spectrum and compressing the pulse. We note that it has recently been shown that the Raman response of N2 can be exploited for compression of near-infrared pulses in hollow capillaries [22]. In contrast, the experimental and simulated spectra for a fiber filled with 0.8 bar of Ar show symmetric spectral broadening, caused by self-phase modulation (lower two panels in Fig.…”

Section: Resultsmentioning

confidence: 85%

Spectral Broadening of Femtosecond UV Pulses in Air-filled Hollow-Core Photonic Crystal Fiber

Luan

Novoa

Russell

2020

Conference on Lasers and Electro-Optics

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We report generation of ultrashort UV pulses by soliton self-compression in kagomé-style hollow-core photonic crystal fiber filled with ambient air. Pump pulses with energy 2.6 µJ and duration 54 fs at 400 nm were compressed temporally by a factor of 5, to a duration of ~11 fs. The experimental results are supported by numerical simulations, showing that both Raman and Kerr effects play a role in the compression dynamics. The convenience of using ambient air, and the absence of glass windows that would distort the compressed pulses, makes the setup highly attractive as the basis of an efficient table-top UV pulse compressor.

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Section: Resultsmentioning

confidence: 85%

Spectral Broadening of Femtosecond UV Pulses in Air-filled Hollow-Core Photonic Crystal Fiber

Luan

Novoa

Russell

2020

Conference on Lasers and Electro-Optics

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“…Still, the fiber is filled with a differential pressure of N 2 to avoid any ionization or self‐focusing at the fiber input, which is pumped in a primary vacuum. As described in the study by Safaei et al, [ 32 ] near the fiber input, the beam is coupled into high‐order modes (HOMs) by self‐focusing, resulting in intermodal four‐wave mixing (IFWM) and the generation of new frequencies. Once the bandwidth of the newly generated frequencies covers the Raman gain, intermodal SRS starts to occur.…”

Section: Multidimensional Solitary Statesmentioning

confidence: 99%

“…While these parameters were chosen to maximize the output energy with minimal consideration for the MDSS conversion efficiency in this work, superior outcomes have already been demonstrated. [ 32 ]…”

Section: Multidimensional Solitary Statesmentioning

confidence: 99%

“…Various approaches based on SRS have been reported in gas cells, [ 26,27 ] hollow‐core photonic crystal fibers, [ 28,29 ] and large‐diameter hollow‐core fibers (HCF). [ 22,23,30–32 ] Particularly, in the study by Safaei et al [ 32 ] , we describe a new regime of nonlinear propagation in HCFs that derives from the spatiotemporal nonlinear Raman enhancement observed with subpicosecond driver pulses. This mechanism allows for scaling the peak power by producing broadband, self‐frequency shifted solitons driven by subpicosecond pulses.…”

Section: Introductionmentioning

confidence: 99%

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Raman Red‐Shift Compressor: A Simple Approach for Scaling the High Harmonic Generation Cut‐Off

Légaré

Safaei

Barrette

et al. 2021

Advanced Photonics Research

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The use of ultrashort laser pulses with long wavelengths as drivers is a relevant strategy for scaling high harmonic generation (HHG) to higher photon energies. Here, stimulated Raman scattering enhanced by the formation of multidimensional solitary states in a molecular gas‐filled hollow‐core fiber as the mechanism to produce a versatile HHG driver is reported on. This recently discovered method allows to red shift and to compress conventional subpicosecond laser pulses with a simple experimental apparatus, ultimately increasing the generated photon energy, while assuring a high photon flux. The adaptability, simplicity, and stability of this method make it attractive for tailoring HHG sources to individual applications at specific photon energies. Measurements of resonant magnetic scattering in a cobalt/platinum multilayer sample are presented as a demonstration of the relevance of this approach for photon‐hungry applications in the extreme ultraviolet.

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“…The SSFS plays a role in several recent studies, especially those of continuum generation and soliton self-compression [12,13]. The interplay of Raman and multimode effects has led to the recent observation of multidimensional solitary states [14]. Despite the importance of Raman effects, there is no systematic study of SSFS in hollow-core fibers to the best of our knowledge.…”

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confidence: 99%

Efficient soliton self-frequency shift in hydrogen-filled hollow-core fiber

Chen,

Sidorenko,

Antonio-Lopez

et al. 2021

Preprint

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We report a study of soliton self-frequency shifting in hydrogen-filled hollow-core fiber. The combination of hydrogen and short 40-fs input pulses underlies clean and efficient generation of Raman solitons between 1080 and 1600 nm. With 240-nJ input pulses, the Raman soliton energy ranges from 110 to 20 nJ over that wavelength range, and the pulse duration is approximately 45 fs. In particular, 70-nJ and 42-fs pulses are generated at 1300 nm. Numerical simulations agree reasonably well with experiments and predict that microjoule-energy tunable pulses should be possible with higher-energy input pulses.

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High-energy multidimensional solitary states in hollow-core fibres

Cited by 73 publications

References 38 publications

Spectral Broadening of Femtosecond UV Pulses in Air-filled Hollow-Core Photonic Crystal Fiber

Spectral Broadening of Femtosecond UV Pulses in Air-filled Hollow-Core Photonic Crystal Fiber

Raman Red‐Shift Compressor: A Simple Approach for Scaling the High Harmonic Generation Cut‐Off

Efficient soliton self-frequency shift in hydrogen-filled hollow-core fiber

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