Abstract

An improved expression for the time-bandwidth product (ΔtΔf) of picosecond optical pulses from gain-switched semiconductor lasers was obtained by a series of numerical simulations based on rate equations without making any assumption for a particular pulse shape and chirp condition. The relation can be expressed by ΔtΔf=0.311+(1.64α)2 as a function of the linewidth-enhancement factor α. The influence of the spontaneous emission factor β on the relation is also examined.

© 1994 Optical Society of America

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