Initial steps of supercontinuum generation in photonic crystal fibers

Hilligsøe, Karen Marie; Paulsen, H.N.; Thøgersen, Jan; Keiding, Søren Rud; Larsen, Jakob Juul

doi:10.1364/josab.20.001887

Cited by 70 publications

(37 citation statements)

References 14 publications

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“…The phase change and amplitude change can cause a frequency sweep of the carrier wave within the pulse envelope and can change the envelope and spatial distribution. 3) Microstructure fibers are being used to produce SC [4][5][6][7][8][9][10][11][12] and the most commonly used microstructure for this application are photonic crystal fibers (PCFs), birefringent photonic crystal fiber, tapered fibers, hollow (holey) fiber arrays, simple and multiple submicron size core fibers, and doped silica fibers. Photonic crystal fibers have been used for different OCT applications very recently.…”

Section: Introductionmentioning

confidence: 99%

Design of highly nonlinear dispersion flattened hexagonal photonic crystal fibers for dental optical coherence tomography applications

Namihira

Hossain

Koga

et al. 2012

OPT REV

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In this paper, we propose a highly nonlinear dispersion flattened hexagonal photonic crystal fiber (HNDF-HPCF) with nonlinear coefficients as large as 57.5 W À1 km À1 at 1.31 m wavelength for dental optical coherence tomography (OCT) applications. This HNDF-HPCF offers not only large nonlinear coefficient but also very flat dispersion slope and very low confinement losses. Using these characteristics of our proposed PCF, it is shown through simulations by using finite difference method with an anisotropic perfectly matched boundary layer that this PCF offers the efficient supercontinuum (SC) generation for dental OCT applications at 1.31 m wavelength using a picosecond pulse easily produced by commercially available less expensive laser sources. Coherent length of light source using SC is found 10 m and the spatial resolutions in the depth direction for dental applications of OCT are found about 6.

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Section: Introductionmentioning

confidence: 99%

Design of highly nonlinear dispersion flattened hexagonal photonic crystal fibers for dental optical coherence tomography applications

Namihira

Hossain

Koga

et al. 2012

OPT REV

View full text Add to dashboard Cite

show abstract

“…Recently, it was theoretically and experimentally verified that the process of higher order soliton splitting can be a dominant effect in SC generation in PCFs [22][23][24]26]. The in- .…”

Section: Propagation Dynamics In the Temporal Domainmentioning

confidence: 98%

“…Thus diffraction and plasma formation terms are neglected. Furthermore, the dispersion of both the nonlinearity, the effective area, and the loss is neglected [12,23,[25][26][27]. In typical experiments the resulting SC is observed to be unpolarized and modelling has showed that the polarization of the pump is important, in particular if short fiber lengths are used.…”

Section: Physical Model Of Scg In Pcfsmentioning

confidence: 99%

Modelling of supercontinuum generation in highly nonlinear photonic crystal fibres

Nikolov

Sørensen

Bang

et al. 2008

J Opt Fiber Commun Rep

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We present a detailed explanation of the modelling of supercontinuum generation in highly nonlinear photonic crystal fibers (PCFs) with low-power picosecond pulses. Due to the strong nonlinearity and necessary broad-band description, the model takes into account self-phase-modulation, cross-phase-modulation, four-wave-mixing, stimulated Raman scattering, linear loss, birefringence, and up to 7th order dispersion. Variations in the fibre parameters along the length of the fibre are described as random fluctuations of the dispersion coefficients, whose strength is estimated from experiments. Our numerical results show that in the PCF direct degenerate four-wave-mixing Stokes and anti-Stokes spectral components are efficiently generated, around which the spectrum broadens in the same way as around the pump. It is important not to loose the power in these additional spectral lines. Depending on the frequency shift relative to the pump and on the gain band-width for the parametric process, the Stokes and anti-Stokes lines may finally merge with the pump, resulting in an ultra-broad spectrum. We show how the dispersion profile of the PCF (in particular a cobweb PCF) must be designed to achieve not only merging, but also stability of the ultra-broad supercontinuum spectrum towards fluctuations in the fibre parameters.

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“…However, it has been originally presented at the background of the propagation of higher-order soliton. In that situation, higher-order soliton was propagated in the anomalous GVD regime which is generally perturbed by the third-and higher-order dispersion [10][11][12][13]. In our previous work, the roles of the self-steepening (SS) effect in the generation and controlling of DW in metamaterials are disclosed [14], and in photonic crystal fiber, the manipulation of DW by the frequency chirped is unfolded [15,16].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Dispersive Wave Generation in Gas-Filled Photonic Crystal Fiber with the Normal Dispersion

Deng

Zhang

2017

Advances in Condensed Matter Physics

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The absence of Raman and unique pressure-tunable dispersion is the characteristic feature of gas-filled photonic crystal fiber (PCF), and its zero dispersion points can be extended to the near-infrared by increasing gas pressure. The generation of dispersive wave (DW) in the normal group velocity dispersion (GVD) region of PCF is investigated. It is demonstrated that considering the selfsteepening (SS) and introducing the chirp of the initial input pulse are two suitable means to control the DW generation. The SS enhances the relative average intensity of blue-shift DW while weakening that of red-shift DW. The required propagation distance of DW emission is markedly varied by introducing the frequency chirp. Manipulating DW generation in gas-filled PCF by the combined effects of either SS or chirp and three-order dispersion (TOD) provides a method for a concentrated transfer of energy into the targeted wavelengths.

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Initial steps of supercontinuum generation in photonic crystal fibers

Cited by 70 publications

References 14 publications

Design of highly nonlinear dispersion flattened hexagonal photonic crystal fibers for dental optical coherence tomography applications

Design of highly nonlinear dispersion flattened hexagonal photonic crystal fibers for dental optical coherence tomography applications

Modelling of supercontinuum generation in highly nonlinear photonic crystal fibres

Dynamics of Dispersive Wave Generation in Gas-Filled Photonic Crystal Fiber with the Normal Dispersion

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