Abstract
The superposition of a weak continuous wave to a train of ultra-short pulses propagating in an optical single-mode fibre can lead to strong interactions between the two co-propagating signals. These interactions result in considerable modifications of the propagated pulse spectrum. A systematic investigation of the dependence of these modifications on various input signal and fibre parameters is presented. It has been found that cw power levels typically 10 6 times lower than the respective pulse peak power are strong enough to induce pronounced modifications in the output pulse spectrum.
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