Picosecond pulse generation by a gain – switched DFB lasers

Abstract

This paper reports on picosecond pulse generation in a gain –switched DFB lasers, modeled by rate equation model. We study numerically the influence of material and geometrical parameters on pulse characteristics. Recently, picoseconds optical pulses find applications in different fields like free-space communications, bio-analytics, sensing, distance measurements, material processing, and spectroscopy. Such short pulses, can be generated by diode lasers. In addition, the diode lasers connected with other types of lasers, as solid state and fibre lasers can improve the pulse energy and peak power of pulses. Therefore, the theoretical and experimental efforts have been performed to improve the performance (shape, magnitude, etc.) of pulsed generated by diode lasers [1]-[3]. With this in mind, we consider in this paper the generation of picosecond pulses by gain-switching of distributed feedback ridge-waveguide laser diode shown.