Abstract
The authors report for the first time subpicosecond pulse generation by pump pulse induced cross-phase modulation in an active fibre. By synchronously pumping a Pr/sup 3+/-doped fluoride fibre with 90 ps Nd:YAG laser pulses, 570 fs pulses at 1.3 mu m were obtained using intracavity dispersion compensation. It was found that the introduction of a polarisation dependent loss into the cavity allows different repetition rates of the fibre laser to be selected and is essential for obtaining stable pulse trains.
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