REDUCED TIMING JITTER OF 2-SECTION 1.55-MU-M LASER-DIODES UNDER GAIN-SWITCHING LOSS-SWITCHING REGIME AT MULTIGIGAHERTZ RATES/

Picosecond pulses at multigigahertz frequencies with low timing-jitter have been generated from two-section 1.55-mu m semiconductor lasers, A pulse jitter of similar to 1 ps was measured at a 5-GHz repetition r ate with the laser diodes operated in gain-switching regime. More than 2x lower values were obtained in the loss-switching regime. A timing jitter model has been adapted to treat two-section laser diodes in the two regimes, The superiority of the loss-switching regime is explaine d by faster laser dynamics around threshold. A good agreement is obtai ned between calculations and timing jitter measurements.