Abstract
We demonstrate ultra-short optical pulses by using a two-stage compression of pulses from a mode-locking SOAFL driven by the injection of a periodic square wave with an asymmetric duty cycle. Through cascading a linear compressor of 110-m dispersion compensation fiber and a soliton compressor of 12-m single-mode fiber, the optical pulses can be shortened to 55fs with a timing jitter of 0.45ps. In the ninth-order soliton compression, the spectral linewidth of the mode-locking SOAFL pulses can be broadened by the self-phase-modulation effect. Also, the compression performance includes a time-bandwidth product up to 0.437 and a pulse-compressing ratio of 54.
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