Abstract
We study experimentally and numerically the temporal features of supercontinuum generated with a continuous-wave ytterbium-doped fiber laser. We show that the temporal output of the supercontinuum is characterized by strong and brief power fluctuations, i.e. so-called optical rogue waves. We demonstrate numerically that these rare and strong events that appear and disappear from nowhere result from solitonic collisions.
Highlights
Supercontinuum generation has attracted much attention [1] since the first demonstration in photonic crystal fibers (PCFs) using an extremely high power femtosecond oscillator [2]
We have reported for the first time to our knowledge a direct experimental temporal characterization of continuous wave (CW)-pumped supercontinuum
We have observed the appearance of so-called optical rogue waves located at the long-wavelength edge of the spectrum
Summary
Supercontinuum generation has attracted much attention [1] since the first demonstration in photonic crystal fibers (PCFs) using an extremely high power femtosecond oscillator [2]. It was soon followed by a number of impressive results in longer pulsed regime, quasicontinuous wave and even continuous wave (CW) pumping schemes [1]. By studying the statistical properties of these fluctuations experimentally and numerically, they observed an L-shaped profile indicating the presence of very rare events with a peak power well above the mean peak power of the output pulses They called these rare events optical rogue waves (ORWs), by analogy with ocean freak waves, whose statistical properties of appearance exhibit the same L-shaped profile [5]. Temporal fluctuations with a very low degree of coherence were reported [6], but no experimental measurement has been performed to characterize the temporal properties of the output light
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