Abstract
Supercontinuum with an ultra-broad bandwidth in the range from 380 nmto 1750 nm was generated by injecting 250 kHz 200 fs optical pulsesproduced by a regeneratively amplified Ti:sapphire laser into a2.5-m-long polarization-maintaining photonic crystal fibre (PCF). It isindicated that the mechanism for the supercontinuum generation in theanomalous dispersion region of the PCF are directly related to theRaman effect, the fission of higher-order solitons, nonsolitonicradiation, and the coinstantaneous effect of four-wave mixing. Thefrequency components beyond 1.4 μm were also observed. It isinterpreted that the energy of solitons is shifted beyond the OHabsorption with a higher input power.
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