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

Medjouri, Abdelkader; Abed, Djamel; Becer, Zoubir

doi:10.1016/j.opelre.2019.01.003

Cited by 31 publications

(16 citation statements)

References 43 publications

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“…Medjouri et al [30] Aparna et al [31] Pooja Chauhan et al [32] Pooja Chauhan et al [33] Mohit Sharma and Konar [34] Than Singh Saini et al [35] Proposed using the telecommunication wavelength of about 1.55 µm.…”

Section: Parametersmentioning

confidence: 99%

“…The white light continuum is the first SC observed in a borosilicate glass [24]. The SC has become the most important achievement and it has several applications, such as pulse compressions in a nonlinear optical medium, optical fiber communication, spectroscopy using ultrafast laser pulses, generation of the frequency comb, optical coherence tomography and metrology [25][26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of defective hybrid cladding with silicon nanocrystal PCF for supercontinuum generation

Rajesh¹,

S²,

Robinson³

2021

Laser Phys.

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Defective hybrid cladding through a silicon nanocrystal-core-structured photonic crystal fiber intended for high pump power supercontinuum proliferation is discussed in this paper. The cladding comprehends a hybrid approach of a hexagonal air hole in the outer section and a petal-structured air hole in the inner layer with a twisted pattern. Such a procedure with an air hole in the cladding section with a silicon nanocore displays high nonlinearity and negative dispersion at the communication window for varying pulse widths with 20 kW pump power. The impact of structural parameters of the proposed structure on the optical constraints is discussed, namely, dispersion, nonlinearity and group-velocity dispersion for wavelengths ranging from 0.45 µm to 1.85 µm. The proposed structure with optimized structural parameters provides high nonlinearity of about 6.38 × 106 W−1 km−1 with negative dispersion of −70.19 ps (nm km)−1 at 1550 nm.

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Section: Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of defective hybrid cladding with silicon nanocrystal PCF for supercontinuum generation

Rajesh¹,

S²,

Robinson³

2021

Laser Phys.

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“…PCFs provide a large degree of freedom in tailoring the dispersion characteristic by changing the size and pattern of air holes in the cross-section such as using double-clad structures or infiltration of different materials which provide tenability. [15,[18][19][20] On the other hand, waveguides provide integration, and hence, different types of waveguides have been considered for SCG, so far. [21][22][23][24] Recently, chalcogenide (ChG) glasses composed of the chalcogen (S, Se, and Te) and metalloid (Ge, As, Sb, and Ga) elements have attracted the attention of scientists in mid-infrared (Mid-IR) SCG [25][26][27] due to its appealing features such as lower two-photon absorption, high resilient to crystallization, higher Kerr coefficient (≈200 times higher than SiO 2 ), higher linear refractive index, and wide spectral transparency compared to fluoride, [28] tellurite, [29] and lead silicate.…”

Section: Doi: 101002/andp202100226mentioning

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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“…Seven rings of air holes arranged in a hexagonal lattice surround the Ga 8 Sb 32 S 60 . Simulations showed that the wavelength range from 1.65 μm to 9.24 μm at 20 dB in this structure was broadband and completely (Medjouri et al 2019). For more, a type of Chg AsSe2 for broadband MIR light source was designed.…”

Section: Introductionmentioning

confidence: 95%

“…All normal dispersion and nonlinear Chg glass were recently studied (Medjouri et al 2019). Seven rings of air holes arranged in a hexagonal lattice surround the Ga 8 Sb 32 S 60 .…”

Section: Introductionmentioning

confidence: 99%

Design of all-normal dispersion with Ge11.5As24Se64.5/Ge20Sb15Se65 chalcogenide PCF pumped at 1300 nm for supercontinuum generation

2021

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Supercontinuum spectrum generation is a process in which laser beam in femtoseconds and high power (kilowatts) is converted into a broad-spectrum beam of light after passing through a specific environment. Of course, achieving this range comes with many limitations. In this paper, photonic crystal fibers are used as a substrate for input pulse due to the ability to control dispersion and loss, and creating single-mode operating conditions. One of the main factors for the formation of supercontinuum spectra of injection pulses is maintaining the nonlinear performance of this type of fiber by controlling the effective mode area and also using chalcogenides (nonlinear coefficients about 100 times higher than silica) in their structure. In the proposed structure, a photonic crystal fiber with silica base element and air cavities with hexagonal structure with the center of Ge11.5As24Se64.5 chalcogenide element have been used to provide the nonlinear property of the structure. Also, in this structure, a ring of Ge20Sb15Se65 chalcogenide elements has been used to reduce the effective mode region and create a flat dispersion curve at a wavelength of 1300 nm (second telecommunication window). The input pulse power is 10 kW and its width is 50 femtoseconds, which has caused the range of the supercontinuum from 800 nm to 1900 nm. This structure can be used to provide the required wavelengths as a carrier in a wavelength division multiplexing (WDM).

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

Cited by 31 publications

References 43 publications

Investigation of defective hybrid cladding with silicon nanocrystal PCF for supercontinuum generation

Investigation of defective hybrid cladding with silicon nanocrystal PCF for supercontinuum generation

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

Design of all-normal dispersion with Ge11.5As24Se64.5/Ge20Sb15Se65 chalcogenide PCF pumped at 1300 nm for supercontinuum generation

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