GENERATION OF PICOSECOND OPTICAL PULSES FROM SINGLE HETEROSTRUCTURE GAAS DIODE-LASER AND THEIR EMISSION CHARACTERISTICS

Emission characteristics of a single heterostructure GaAs diode laser are reported using a simple driver circuit. It provides a single picos econd time duration optical pulse, a pulse train or a broad optical pu lse depending on the amplitude and time duration of the electrical pum p pulse. Results show that relaxation oscillation frequency depends on the amplitude of pumping current pulse as well as on some inherent pr operty of diode laser, which seems to be the level of impurity in lasi ng medium. Variation of relaxation oscillation frequency with amplitud e of current pulse shows only the qualitative agreement with the repor ted theoretical predictions.