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A Kramers-Kronig transform of multiphoton ionization rates allows for a computation of the spectrally dependent nonlinear refractive index change and predicts its intensity dependent saturation and inversion in remarkable agreement with recent experimental results.
The concept of rogue waves arises from a mysterious and potentially calamitous phenomenon of oceanic surfaces. There is mounting evidence that they are actually commonplace in a variety of different physical settings. A set of defining criteria has been advanced; this set is of great generality and therefore applicable to a wide class of systems. The… (More)
We report on a numerical study of supercontinuum generation in a single-mode optical fiber. We show that the modulation instability (MI) can be responsible for the generation of ultrabroadband octave-spanning continua for pico- and subpicosecond pulses in the anomalous- as well as in the normal dispersion region. The MI turns out to dominate higher-order… (More)
We discuss pulse-splitting-isolation cycles as the origin of pulse self-compression in filaments. These cycles can be cascaded in a single gas-filled cell, giving rise to tenfold compression. XFROG spectrograms provide experimental evidence for double self-compression.
We experimentally show that the windows frequently used for filament cells have a decisive influence on nonlinear pulse shaping, determining the group-delay-dispersion of the self-compressed pulses.
We have detected a fundamental pulse-compression limit for high-nonlinear dispersion-flattened fibers in the normal dispersion regime near the zero-dispersion wavelength. The desired generation of a broadband continuum by self-phase modulation is perturbed by already small third-order dispersion, which results in pulse splitting above a critical pulse power
While usually the generation of a Stokes component is attributed to Raman scattering, we present here experimentally and numerically a mechanism which can be explained by the nonlinear Schrodinger equation alone. It can be employed to excite new frequency components on the red side, by using pulse splitting in the normal dispersion regime.
The pulse compression of ultra-short few-cycles pulses in nonlinear optical fibers is studied using the multisymplectic integration of the short pulse equation.
We reanalyse the probability for formation of extreme waves using the simple model of linear interference of a finite number of elementary waves with fixed amplitude and random phase fluctuations. Under these model assumptions no rogue waves appear when less than 10 elementary waves interfere with each other. Above this threshold rogue wave formation… (More)
We demonstrate experimental evidence for non-instantaneous polarization decay in dielectrics. The few-femtosecond relaxation times agree favorable with solutions of the time-dependent Schrödinger equation and relate to resonances of the quantum mechanical dipole.