Dispersion tailoring of photonic crystal fibers for flat-top, coherent, and broadband supercontinuum generation

Hashemi, Seyed Ali Seyed; Noori, Mina

doi:10.1088/1402-4896/ab957e

Cited by 5 publications

(4 citation statements)

References 45 publications

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“…On the other hand, plasmonic sensors based on PCFs provide not only a large degree of freedom in design, but also diverse types of sensors could be realized with plasmonic layer deposited in the inner of the sensing holes, the outer layer of the cladding, and on the flat surface of D-shape PCFs [20]. Besides sensing, PCFs present outstanding applications in dispersion management, supercontinuum generation, and optical communications [21][22][23]. Owing to different structural parameters such as lattice pattern, radii of holes, lattice constant, and infiltration of holes with diverse gases and liquids, PCFs provide amazing characteristics such as ultra-small effective mode area, high nonlinearity, endlessly single-mode operation, and birefringence [24].…”

Section: Introductionmentioning

confidence: 99%

Analyte detection based on SPR in 12-fold quasi-periodic PCF

Abbasiyan¹,

Noori²,

Vakili³

et al. 2021

Phys. Scr.

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In this article, an SPR sensor based on 12-fold quasi-periodic PCF composed of Ge-doped silica is introduced for analyte detection. The outer surface of the cladding is covered by a 40 nm gold layer serving as the plasmonic layer for the proposed sensor. The birefringence induced due to the inherent characteristic of the 12-fold pattern in the cross-section provides discrepancy for the operation of the structure regarding x- and y-polarizations. The wavelength sensitivity, amplitude sensitivity, and resolution of 12150 nm.RIU−1, 678 RIU−1, and 8.23 × 10–6 RIU, respectively are obtained for the proposed sensor. The FEM method has been implemented to investigate the performance of the proposed sensor for biosensing application in a detection range of 1.33–1.41.

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Section: Introductionmentioning

confidence: 99%

Analyte detection based on SPR in 12-fold quasi-periodic PCF

Abbasiyan¹,

Noori²,

Vakili³

et al. 2021

Phys. Scr.

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“…This new effective dispersion allows creating new dispersion landscapes that are not achievable in uniformly shaped fibers. Hence, resonance‐empowered dispersion management provides a general, versatile concept which could find application in highly sensitive dispersion management for precise spectral shaping [ 24 , 48 ] or dispersion flattened fibers [ 49 , 50 ] for triggering new advances in on‐chip nonlinear frequency conversion, supercontinuum generation, and optical signal processing.…”

Section: Discussionmentioning

confidence: 99%

Tailored Multi‐Color Dispersive Wave Formation in Quasi‐Phase‐Matched Exposed Core Fibers

et al. 2022

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Widely wavelength‐tunable femtosecond light sources in a compact, robust footprint play a central role in many prolific research fields and technologies, including medical diagnostics, biophotonics, and metrology. Fiber lasers are on the verge in the development of such sources, yet widespan spectral tunability of femtosecond pulses remains a pivotal challenge. Dispersive wave generation, also known as Cherenkov radiation, offers untapped potentials to serve these demands. In this work, the concept of quasi‐phase matching for multi‐order dispersive wave formation with record‐high spectral fidelity and femtosecond durations is exploited in selected, partially conventionally unreachable spectral regions. Versatile patterned sputtering is utilized to realize height‐modulated high‐index nano‐films on exposed fiber cores to alter fiber dispersion to an unprecedented degree through spatially localized, induced resonances. Nonlinear optical experiments and simulations, as well as phase‐mismatching considerations based on an effective dispersion, confirm the conversion process and reveal unique emission features, such as almost power‐independent wavelength stability and femtosecond duration. This resonance‐empowered approach is applicable to both fiber and on‐chip photonic systems and paves the way to instrumentalize dispersive wave generation as a unique tool for efficient, coherent femtosecond multi‐frequency conversion for applications in areas such as bioanalytics, life science, quantum technology, or metrology.

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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%

“…Although the novelty of the proposed structure in this article, is to implement graded cladding to reach near-zero dispersion characteristic (the concept, very similar to our recently published article in Physica Scripta for PCFs [18] ), here we aimed at investigating the performance of the proposed structure combined with graphene, regarding fabrication and other challenges (such as transparency, nonlinearity, …) that may affect the performance of the structure in SCG.…”

Section: With Graphenementioning

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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Dispersion tailoring of photonic crystal fibers for flat-top, coherent, and broadband supercontinuum generation

Cited by 5 publications

References 45 publications

Analyte detection based on SPR in 12-fold quasi-periodic PCF

Analyte detection based on SPR in 12-fold quasi-periodic PCF

Tailored Multi‐Color Dispersive Wave Formation in Quasi‐Phase‐Matched Exposed Core Fibers

Super‐Continuum Generation in Graphene‐Based Chalcogenide Slot Waveguide

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