Ultraflat-top midinfrared coherent broadband supercontinuum using all normal As 2 S 5 -borosilicate hybrid photonic crystal fiber

Salem, Amine Ben; Diouf, Mbaye; Chérif, Rim; Wague, Ahmadou; Zghal, Mourad

doi:10.1117/1.oe.55.6.066109

Cited by 40 publications

(11 citation statements)

References 25 publications

(33 reference statements)

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“…Consequently, highly coherent SCs can be obtained from such fibers. Coherent SCs based on ChG fibers with ANDi profiles have been reported in several experiments and simulations [140,143,168,169]. Liu et al [168] used a ChG MOF with a core material of AsSe 2 and four air holes replaced by As 2 S 5 glass rods to engineer the dispersion to ANDi.…”

Section: Coherent Sc Sources Based On Chg Fibersmentioning

confidence: 99%

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A Review of Mid-Infrared Supercontinuum Generation in Chalcogenide Glass Fibers

et al. 2018

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Chalcogenide glasses have the advantages of a wide transparency window (over 20 µm) and high optical nonlinearity (up to a thousand times greater than that of silica glasses), making them good candidates for mid-infrared supercontinuum generation. In this review, we describe both the history and recent developments in mid-infrared supercontinuum generation from chalcogenide fibers according to three kinds of fiber structures: step-index, microstructured and tapered fibers. We also review the coherence properties of mid-infrared supercontinuum generation and all-fiber supercontinuum sources based on chalcogenide fibers.

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Section: Coherent Sc Sources Based On Chg Fibersmentioning

confidence: 99%

“…Besides tellurite glasses, borosilicate glasses have also been used as cladding materials of MOFs. Salem et al [143] numerically reported MIR SC generation from 1 to 5 µm in an As 2 S 5 -borosilicate MOF.…”

Section: Sc Generation In Chg Mof Fibersmentioning

confidence: 99%

A Review of Mid-Infrared Supercontinuum Generation in Chalcogenide Glass Fibers

et al. 2018

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“…According to previous studies, a high degree of coherence is accessible in waveguides with all-normal dispersion. [59,60] The noise sensitivity associated with input pulse is investigated through the degree of coherence introduced by Equation ( 8).…”

Section: The Proposed Structure and Principlesmentioning

confidence: 99%

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

et al. 2021

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Slot waveguides comprised of Ge 23 Sb 7 S 70 and Si with and without graphene are considered for super-continuum generation in the mid-infrared range. The dispersion characteristics are optimized for the proposed waveguides comprised of Si and Ge 23 Sb 7 S 70 chalcogenide as the core and cladding, respectively with and without graphene sheets embedded in the proposed structure. The proposed waveguide without graphene possesses all-normal dispersion and the super-continuum spectra with bandwidth of 1.75 µm is obtained for a pump with wavelength of 2 µm, peak power of 100 W, and time duration of 50 fs, at 20 dB level. Also, the total length of the waveguide is 8 mm. The optimized structure with three graphene sheets presents flat anomalous dispersion and the super-continuum spectra with bandwidth of 3 µm is obtained for a pump with wavelength, peak power, and time duration of 3 µm, 7 mW, and 50 fs, respectively at 10 dB level. It is demonstrated that the proper dispersion region for super-continuum generation depends on the sign of Kerr-index of the nonlinear material. The proposed waveguides are highly compatible with fabrication technologies for mid infrared applications. IntroductionRecently, super-continuum generation (SCG) has attracted a great deal of interest in the design of broadband optical sources. [1] SCG originates from the interaction between diverse nonlinear and linear effects. The nonlinear effects include self-phase modulation (SPM), [2] cross-phase modulation, [3] soliton formation, [4] soliton fission (SF), stimulated Raman scattering, [5] four-wave mixing (FWM), [6,7] and the main linear characteristics are the dispersion and loss. SCG is applicable in optical coherence tomography, spectroscopy, high-precision frequency metrology, and pulse

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“…Although the comparison is performed by considering a spectral flatness of 20 dB level, it reveals the potential of our proposed Ga 8 Sb 32 S 60 ChG glass based PCF to generate coherent, broadband and ultra-flat SC spectra. Also, it is worth noting that the SC is generated in our PCF with a simple design compared to more complex structures such as multi-material PCFs [19,22], PCF with different air holes diameters [17] or nanostructured graded-index fiber [43].…”

Section: Simulation Of Mid-infrared Sc In the Proposed Pcfmentioning

confidence: 99%

“…They have numerically shown that coherent SC spectrum extending from 2.9 to 4.575 m at a 3 dB spectral flatness level can be achieved by launching a 0.05 nJ energy laser pulses pumped at a central wavelength of 3.7 m into a 5 cm ANDi PCF length. A. Ben Salem et al reported SC generation in a kind of hybrid PCF composed of As 2 S 5 ChG glass and borosilicate [19]. The authors have shown that coherent and ultra-flat SC spectra spanning from 1 to 5 m can be obtained by injecting at 2.5 m, 50 fs pulses with 28.16 kW peak power through 4 mm PCF length.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of a broadband coherent supercontinuum generation in Ga8Sb32S60 chalcogenide photonic crystal fiber with all-normal dispersion

Medjouri¹,

Abed²,

Becer³

2019

Opto-Electronics Review

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All normal dispersion (ANDi) and highly nonlinear chalcogenide glass photonic crystal fiber (PCF) is proposed and numerically investigated for a broad, coherent and ultra-flat mid-infrared supercontinuum generation. The proposed PCF consists of a solid core made of Ga 8 Sb 32 S 60 glass surrounded by seven rings of air holes arranged in a triangular lattice. We show by employing the finite difference frequency domain (FDFD) method that the Ga 8 Sb 32 S 60 PCF dispersion properties can be engineered by carefully adjusting the air holes diameter in the cladding region and ANDi regime is achieved over the entire range of wavelengths with a zero chromatic dispersion around 4.5 m. Moreover, we demonstrate that injecting 50 fs width and 20 kW peak power laser pulses (corresponding to a pulse energy of 1.06 nJ) at a pump wavelength of 4.5 m into a 1 cm long ANDi Ga 8 Sb 32 S 60 PCF generates a broad, flat-top and perfectly coherent SC spectrum extending from 1.65 m to 9.24 m at the 20 dB spectral flatness. These results make the proposed Ga 8 Sb 32 S 60 PCF an excellent candidate for various important mid-infrared region applications including mid-infrared spectroscopy, medical imaging, optical coherence tomography and materials characterization.

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Ultraflat-top midinfrared coherent broadband supercontinuum using all normal As 2 S 5 -borosilicate hybrid photonic crystal fiber

Cited by 40 publications

References 25 publications

A Review of Mid-Infrared Supercontinuum Generation in Chalcogenide Glass Fibers

A Review of Mid-Infrared Supercontinuum Generation in Chalcogenide Glass Fibers

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

Numerical investigation of a broadband coherent supercontinuum generation in Ga8Sb32S60 chalcogenide photonic crystal fiber with all-normal dispersion

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