Sub-100fs Higher Order Soliton Compression in Dispersion-Flattened Fibers(Special Issue on Ultrafast Optical Signal Processing and Its Application)

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We review recent progresses in our studies on the fiber-optic soliton compression and related subjects with special empbasis on dispersion-flattened fibers (DFFs). As for the ultimately sbort pulse generation, it has been riemonstrated to compress 5ps laser diode pulses down to 20fs with a 15.1mlong single-stage step-like dispersion profiled fiber employed. The compression was brought about through a series of the higher order soliton processes in conjunction with a single and ordinary erbium-doped fiber preamplifier, and DFFs contained at its end played a major role. We have performed intensive investigations on the DFF compression mechanisms in the 100-20fs range. A fairly reliable model was developed for the higher order soliton propagation along a DFF in the temporal range from 100 down to 30fs by taking into consideration the higher order nonlinear and dispersion effects as well as incident pulse shape dependence. Through the simulation, parametric spectrum generation originating from the modulation instability gain was pointed out at frequencies apart from the pump wave frequency, which agrees with the experimental observation. Its possible application is also discussed.
社団法人電子情報通信学会の論文
2002-01-01