par Leners, Roland ;Foursa, Dmitri ;Emplit, Philippe ;Haelterman, Marc
Référence EQEC'96(8-13 September 1996: Hamburg, Germany), Digest of the European Quantum Electronics Conference, Institute of Electrical and Electronics Engineers, New York, page (87)
Publication Publié, 1996
Publication dans des actes
Résumé : This paper demonstrates a novel all-optical technique to generate a multigigahertz dark soliton train by using a high resolution filtering of a conventional mode-locked laser source [2]. The amplitude and phase filtering is performed by a specially designed fibre Bragg grating and converts a 17 ps, 6.1 GHz bright pulse train into a 33 ps dark pulse train with an identical repetition rate. A numerical comparison between the temporal shape of the dark pulse train and its spectrum indicates that both the amplitude and the phase filtering are correctly performed i.e. that the dark pulses exhibit an approximate π phase shift across the dark part of the pulse. This paper also discusses in more detail the link between the temporal and spectral profiles of the pulses. The dark pulses are amplified to typical soliton powers and propagated over 7.7 km of dispersion compensating fibre with a normal dispersion of -68 ps/nm.km and an attenuation of 1.7 dB/km. The propagation distance slightly exceeds the soliton distance.