Amplitude noise and coherence degradation of femtosecond supercontinuum generation in all-normal-dispersion fibers

Genier, Étienne; Bowen, Patrick; Sylvestre, Thibaut; Dudley, John M.; Moselund, Peter M.; Bang, Ole

doi:10.1364/josab.36.00a161

Cited by 93 publications

(64 citation statements)

References 30 publications

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“…For the simulations, a Gaussian pulse was used. Quantum noise was added to the initial pulse following the one photon per mode model (see [44] for more details). The numerical models used for each fiber are also presented, including dispersion, nonlinear parameters and losses.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…We could for instance replace the fiber laser and the cascaded system with polarization-maintaining fibers [53,54]. About coherence, it is evident that tis cascaded fiber system does not maintain the initial temporal coherence of the input laser but we could consider all-normal dispersion (ANDi) chalcogenide fibers directly pumped with mid-IR femtosecond fiber lasers to improve this feature [44]. Nevertheless, we believe that, despite the mentioned weaknesses, current mid-infrared supercontinuum all-fiber sources will find several applications and represent a landmark to foster the improvement of such broadband sources in other fiber or chip-based photonic platforms.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

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Cascaded Fiber-based Mid-Infrared Supercontinuum Source

Venck¹,

St-Hilaire²,

Brilland³

et al. 2020

Preprint

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Mid-infrared supercontinuum (SC) sources in the 2 to 20 µm molecular fingerprint region are in high demand for a wide range of applications including optical coherence tomography, remote sensing, molecular spectroscopy, and hyperspectral imaging. In this work, we investigate mid-IR SC generation in a cascaded silica-ZBLAN-chalcogenide fiber system directly pumped with a commercially-available 460-ps pulsed fiber laser operating in the telecommunications window at 1.55 µm. This fiber-based system is shown to generate a flat broadband mid-IR SC covering the entire range from 2 to 10 µm with several tens of mW of output power. This technique paves the way for low cost, practical, and robust broadband SC sources in the mid-IR without the requirement of mid-infrared pump sources or Thulium-doped fiber amplifiers. We also describe a fully-realistic numerical model used to simulate the nonlinear pulse propagation through the cascaded fiber system and use our numerical results to discuss the physical processes underlying the spectral broadening in the cascaded system. We conclude with recommendations to optimize the current cascaded systems based on the simulation results.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Cascaded Fiber-based Mid-Infrared Supercontinuum Source

Venck¹,

St-Hilaire²,

Brilland³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…[ 53,54 ] About coherence, it is evident that this cascaded fiber system does not maintain the initial temporal coherence of the input laser but we could consider all‐normal dispersion (ANDi) chalcogenide fibers directly pumped with mid‐IR femtosecond fiber lasers to improve this feature. [ 44 ] Nevertheless, we believe that, despite the mentioned weaknesses, current mid‐infrared supercontinuum all‐fiber sources will find several applications and represent a landmark to foster the improvement of such broadband sources in other fiber or chip‐based photonic platforms.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

2–10 µm Mid‐Infrared Fiber‐Based Supercontinuum Laser Source: Experiment and Simulation

Venck¹,

St-Hilaire

Brilland³

et al. 2020

Laser & Photonics Reviews

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Mid‐infrared supercontinuum (mid‐IR SC) sources in the 2–20 µm molecular fingerprint region are in high demand for a wide range of applications including optical coherence tomography, remote sensing, molecular spectroscopy, and hyperspectral imaging. Herein, mid‐IR SC generation is investigated in a cascaded silica‐ZBLAN‐chalcogenide fiber system directly pumped with a commercially available pulsed fiber laser operating in the telecommunications window at 1.55 µm. This fiber‐based system is shown to generate a flat broadband mid‐IR SC covering the entire range from 2 to 10 µm with several tens of mW of output power. This technique paves the way for low cost, practical, and robust broadband SC sources in the mid‐IR without the requirement of mid‐infrared pump sources or Thulium‐doped fiber amplifiers. A fully realistic numerical model used to simulate the nonlinear pulse propagation through the cascaded fiber system is also described and the numerical results are used to discuss the physical processes underlying the spectral broadening in the cascaded system. Finally, recommendations are provided for optimizing the current cascaded system based on the simulation results.

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“…In our calculation, we included both quantum noise and the measured 5.5% pulse-to-pulse amplitude and pulse width fluctuations from the laser as in 34 . The initial condition with the noise terms becomes:…”

Section: Theory and Experiments Of Rinmentioning

confidence: 99%

“…To take into account that our Ti:Sapphire pump laser is a mode-locked laser, we assume that the peak power and pulse length are anti-correlated, i.e., ΔT = ⎼αΔP , where α=1.0 is chosen. Recently an Onefive Origami 10 fs laser was studied, for which α=0.4, and anticorrelated amplitude and pulse length noise of only 0.2% was shown to strongly dominate quantum noise 34 . In ref.…”

Section: Theory and Experiments Of Rinmentioning

confidence: 99%

Noise and spectral stability of deep-UV gas-filled fiber-based supercontinuum sources driven by ultrafast mid-IR pulses

Adamu

Habib

Smith

et al. 2020

Sci Rep

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Deep-UV (DUV) supercontinuum (SC) sources based on gas-filled hollow-core fibers constitute perhaps the most viable solution towards ultrafast, compact, and tunable lasers in the UV spectral region. Noise and spectral stability of such broadband sources are key parameters that define their true potential and suitability towards real-world applications. In order to investigate the spectral stability and noise levels in these fiber-based DUV sources, we generate an SC spectrum that extends from 180 nm (through phasematched dispersive waves -DWs) to 4 μm by pumping an argon-filled hollow-core anti-resonant fiber at a wavelength of 2.45 μm. We characterize the long-term stability of the source over several days and the pulse-to-pulse relative intensity (RIN) noise of the strongest DW at 275 nm. The results indicate no sign of spectral degradation over 110 hours, but the RIN of the DW pulses at 275 nm is found to be as high as 33.3%. Numerical simulations were carried out to investigate the spectral distribution of the RIN and the results confirm the experimental measurements and that the poor noise performance is due to the RIN of the pump laser, which was hitherto not considered in numerical modelling of these sources. The results presented herein provide an important step towards an understanding of the noise mechanism underlying such complex light-gas nonlinear interactions and demonstrate the need for pump laser stabilization. ABSTRACTThis document provides supplementary information to "Noise and spectral stability of deep-UV gas-filled fiber-based supercontinuum sources". Here we provide the details of the phase-matching conditions between the soliton and dispersive waves, and compared our expression to other expressions mentioned in the manuscript. Additionally, we provide he figures for filtered DUV used for the RIN measurements as well as the histograms of the RINs for the pump laser, Ti:sapphire, and DUV at 360 nm and 280 nm. We further compared the coherence and RINs when the pump laser noise is not considered and when considered.

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Amplitude noise and coherence degradation of femtosecond supercontinuum generation in all-normal-dispersion fibers

Cited by 93 publications

References 30 publications

Cascaded Fiber-based Mid-Infrared Supercontinuum Source

Cascaded Fiber-based Mid-Infrared Supercontinuum Source

2–10 µm Mid‐Infrared Fiber‐Based Supercontinuum Laser Source: Experiment and Simulation

Noise and spectral stability of deep-UV gas-filled fiber-based supercontinuum sources driven by ultrafast mid-IR pulses

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