Optimum Integration Procedures for Supercontinuum Simulation

Rieznik, A. A.; Heidt, Alexander M.; König, Pablo G.; Bettachini, Victor A.; Grosz, D. F.

doi:10.1109/jphot.2012.2188281

Cited by 48 publications

(18 citation statements)

References 21 publications

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“…Additionally we employ an adaptive step size algorithm based on photon number conservation to improve computational speed and ensure sufficient accuracy as the pulse is propagated along the fiber [33]. The implementation of the model is discussed in detail in [34], and a general version of the simulation code is freely available [35]. The model includes the full dispersion information of the fiber and all relevant nonlinear effects, such as the instantaneous Kerr-type electronic response, delayed Raman contributions, self-steepening and shock-formation terms.…”

Section: Numerical Modelmentioning

confidence: 99%

Limits of coherent supercontinuum generation in normal dispersion fibers

et al. 2017

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We study the largely unexplored transition between coherent and noise-seeded incoherent continuum generation in all-normal dispersion (ANDi) fibers and show that highly coherent supercontinua with spectral bandwidths of one octave can be generated with long pump pulses of up to 1.5 ps duration, corresponding to soliton orders of up to N = 600. In terms of N, this corresponds to an approximately 50 times increase of the coherent regime compared to anomalous dispersion pumping. In the transition region between coherent and incoherent spectral broadening we observe the manifestation of nonlinear phenomena that we term incoherent cloud formation and incoherent optical wave breaking, which lead to a gradual or instantaneous coherence collapse of SC spectral components, respectively. The role played by stimulated Raman scattering and parametric four-wave mixing during SC generation in ANDi fibers is shown to be more extensive than previously recognized: their nonlinear coupling contributes to the suppression of incoherent dynamics at short pump pulse durations, while it is responsible for non-phasematched parametric amplification of noise observed in the long pulse regime. We further discuss the dependence of SC coherence on fiber design, and present basic experimental verifications for our findings using single-shot detection of SC spectra generated by picosecond pulses. This work outlines both the further potential as well as the limitations of broadband coherent light source development for applications such as metrology, nonlinear imaging, and ultrafast photonics, amongst others.

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Section: Numerical Modelmentioning

confidence: 99%

Limits of coherent supercontinuum generation in normal dispersion fibers

et al. 2017

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“…For the simulations, the Runge-Kutta Fourth-Order Interaction Picture (RK4IP) method [27] was used to numerically solve the generalized vector nonlinear Schrödinger equation. In particular, a variation formulated in the frequency domain was used with the Conservation Quantity Error Method (CQEM) [28] for adaptive step sizing as this combination has been shown to reduce propagation error [27,29]. The field was represented by two 2 12 arrays, one for both the x-and y-polarisation components of the pulse.…”

Section: Simulations a Model Developmentmentioning

confidence: 99%

Simulations and experiments showing the origin of multiwavelength mode locking in femtosecond, Yb-fiber lasers

et al. 2016

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A stable and self-starting femtosecond breathing-pulse Yb-fiber oscillator is reported, modelocked using the nonlinear polarisation evolution mechanism. A bifurcation between two distinct modes of operation is demonstrated experimentally, producing pulses with a single central wavelength in one state, or following adjustment of the intra-cavity waveplates, the emission of pulses with three distinct central wavelengths. The maximum bandwidth was 72 nm at the -10 dB level and the pulses were compressible externally to 70 fs with energies of 0.75 nJ. The multi-wavelength pulses reported here are significantly shorter than the pico-second pulses previously observed from similar modelocked multi-wavelength sources. Vector simulations based on the nonlinear Schrödinger equation show that the multi-wavelength behaviour is produced by overdriving the nonlinear polarisation evolution based saturable absorber at the peak of the pulse, leading to transmission of the two wings of the strongly chirped pulse. This new insight shows clearly that the three pulses output in the multi-wavelenght state are coherent. The agreement between simulation and experimental data shows nonlinear polarisation evolution based modelocked fiber lasers are a suitable platform for studying the nonlinear dynamics underlying the bifurcation of the output.

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“…For simulating SCG in proposed PCF structure we have solved Eq. (10) using interaction picture method in combination with conservation quantity error adaptive step-size algorithm [48].…”

Section: Simulation Of Supercontinuum Generation In Proposed Tc Pcfmentioning

confidence: 99%