Widely wavelength-tunable 40 GHz femtosecond pulse source based on compression of externally-modulated pulse using 1.4 km comb-like profiled fibre

Abstract
Wide tunability over the entire C-band of the generation of 40 GHz high-quality 500 fs pulse train is shown by compressing an externally-modulated pulse train using 1.4 km comb-like profiled fibre. The use of the comb-like profiled fibre is essential for the features of short fibre and wide operating wavelength range.