Generation of intense 100  fs solitons tunable from 2 to 43  μm in fluoride fiber

Tang, Yuxing; Wright, Logan G.; Charan, Kriti; Wang, Tianyu; Xu, Chris; Wise, Frank W.

doi:10.1364/optica.3.000948

Cited by 140 publications

(64 citation statements)

References 32 publications

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“…[55]. The mode-effective areas of the proposed PCF structures are calculated using the FEM mode-solver and their corresponding nonlinear coefficients are evaluated by considering the nonlinear refractive index, n 2 = 1.1 × 10 −17 D [ps/nm/km] Comparison between actual GVD curve obtained by FEM mode-solver and data-fitted GVD curves obtained by Taylor-series expansion for the successive inclusion of HOD terms from β 3 to β 12 .…”

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confidence: 99%

Mid-infrared supercontinuum generation using As2Se3 photonic crystal fiber and the impact of higher-order dispersion parameters on its supercontinuum bandwidth

Karim

Ahmad

Ghosh

et al. 2018

Optical Fiber Technology

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Citation: Karim, M. R., Ahmad, H., Ghosh, S. ORCID: 0000-0002-1992-2289 and Rahman, B. M. ORCID: 0000-0001-6384-0961 (2018). Mid-infrared supercontinuum generation using As2Se3 photonic crystal fiber and the impact of higher-order dispersion parameters on its supercontinuum bandwidth. This is the accepted version of the paper.This version of the publication may differ from the final published version.Permanent repository link: http://openaccess.city.ac.uk/20499/ Link to published version: http://dx. AbstractA dispersion engineered As 2 Se 3 chalcogenide hexagonal photonic crystal fiber which can produce mid-infrared supercontinuum (SC) spectral evolution spanning from 2 µm to beyond 15 µm with a low peak power of 3 kW is numerically designed and demonstrated. Numerical analysis is carried out to investigate the impact of higher-order dispersion (HOD) parameters on the output SC bandwidth. Numerical analysis shows that the SC spectral broadening at the output of the proposed design depends on the convergence of the Taylor approximation with increasing fitting parameters, which implies a sufficient number of HOD parameters must be included during numerical simulations. Four designs with different structural parameters are optimized for pumping each operating at a different pump wavelength to test the convergence of output SC by the successive addition of HOD parameters. To realize spurious free SC spectral evolution by the proposed designs, HOD terms up to the sixteenth-order are included during all SC simulations. The proposed design can be used in molecular finger print spectroscopy, bio-medical imaging as well as various mid-infrared region applications.

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confidence: 99%

Mid-infrared supercontinuum generation using As2Se3 photonic crystal fiber and the impact of higher-order dispersion parameters on its supercontinuum bandwidth

Karim

Ahmad

Ghosh

et al. 2018

Optical Fiber Technology

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“…The spectrum at 700 mW output power shows in . Even though the efficiency decreased in longer wavelength regime, the efficiency across the tunable range is >76%, which is higher than those reported in previous works [69][70][71][72][73].…”

Section: 21! Experimental Setup and Resultscontrasting

confidence: 70%

Ultrafast mid-IR fiber laser

Luo¹

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“…Due to having high material dispersion of ChG glass around the wavelengths of 1.55 µm and 2 µm, we do not able to obtain peak of the GVD curve vicinity to the pump wavelengths for this design. Then, we move to the next design and optimize a PCF structure for pumping at 3.1 µm which is realized in tunable Raman soliton fluoride fiber lasers with the range 2-4.3 µm [15]. To obtain peak of the GVD curve vicinity to this wavelength with a smaller value of GVD, waveguide dispersion needs to be increased by adjusting the Λ and d of PCF.…”

Section: Numerical Resultsmentioning

confidence: 99%

All-Normal Dispersion Chalcogenide PCF for Ultraflat Mid-Infrared Supercontinuum Generation

Karim

Ahmad

Rahman

2017

IEEE Photon. Technol. Lett.

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract-We numerically study the dispersion-engineered chalcogenide photonic crystal fiber (PCF) which allows us to generate ultraflat broadband supercontinuum (SC) spectra in allnormal dispersion regime. A 1-cm-long chalcogenide hexagonal PCF made using Ge11.5As24Se64.5 glass pumped at 1.55 µm produced a SC bandwidth 700 nm at a peak power of 1 kW. By shifting pump at 2 µm, SC spectra can be extended with a bandwidth of 1900 nm at the same peak power level. In both cases, nonuniform spectral power distribution observes over the entire output bandwidth owing to the lower dispersion slop on the long wavelength side of the dispersion curve. To spanning SC further in the mid-infrared as well as to reduce the spectral asymmetry, we optimize another design for pumping at 3.1 µm in such a way that the pump source can be employed vicinity to the peak of the dispersion curve. Employing the largest pump peak power up to 5 kW, SC can be extended up to 6 µm (1.5 octaves) and the power distribution among the spectral components over the entire SC bandwidth can be improved significantly by this design. To enhance the spectral flatness, we optimize a second PCF geometry by reducing its pitch length and it is possible to obtain ultraflat coherent SC spanning from 2 µm to 5.5 µm (>1 octave) by this structure maintaining nearly symmetric power distribution between both side of its spectral components. Permanent repository link

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Generation of intense 100 fs solitons tunable from 2 to 43 μm in fluoride fiber

Cited by 140 publications

References 32 publications

Mid-infrared supercontinuum generation using As2Se3 photonic crystal fiber and the impact of higher-order dispersion parameters on its supercontinuum bandwidth

Mid-infrared supercontinuum generation using As2Se3 photonic crystal fiber and the impact of higher-order dispersion parameters on its supercontinuum bandwidth

Ultrafast mid-IR fiber laser

All-Normal Dispersion Chalcogenide PCF for Ultraflat Mid-Infrared Supercontinuum Generation

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