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We show experimentally and theoretically that fiberoptic analogues of event horizons can be explained by cascaded four-wave mixing between two continuous waves. Excellent agreement is obtained between experiments using pulsed and continuous wave lasers.
The emission of Cherenkov radiation (CR) by solitons propagating in optical fibers has been extensively studied and is known to play a central role in the generation of broadband supercontinua [1]. This process is generally described in terms of a phase-matching condition between the soliton propagating in the anomalous dispersion regime and a dispersive wave in the region of normal dispersion. Although...
Conventionally dispersive wave (DW) emission in nonlinear fiber optics is described in the time-domain as the resonant amplification of a linear wave propagating in-phase with a soliton pump [1]. Recently, however, a complementary frequency-domain description has been presented, which identifies the nonlinear origins of the process as phasematched cascaded four-wave mixing [2]. This new theory predicts...
This paper discusses recent experiments demonstrating dramatic improvements in the tunability and power output of fiber optical parametric amplifiers constructed utilising both conventional fibers and photonic crystal fibers.
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