Abstract :
5 GHz pulses from a mode-locked semiconductor laser diode have been compressed from 10.5 to 4.6 ps by means of cross-phase modulation using a separate optically amplified mode-locked laser diode. By tuning the laser wavelengths symmetrically about the 1.55 mu m dispersion zero of an 11 km length of fibre, the effect of group velocity dispersion is minimised, ensuring that the fibre is used efficiently. The spectral broadening induced by the cross-phase modulation enables pulse compression in a dispersive fibre.
Keywords :
high-speed optical techniques; laser mode locking; laser tuning; optical dispersion; optical fibres; optical modulation; semiconductor lasers; 1.55 micron; 11 km; 4.6 ps; 5 GHz; cross-phase modulation; dispersion zero; dispersive fibre; mode-locked semiconductor laser diode; optical fibre; optically amplified mode-locked laser diode; picosecond pulses; pulse compression; spectral broadening; tuning;
