Influence of microwave modulation on the emission spectrum of an injection laser

An investigation was made of the kinetics of the spectrum of the output radiation of an injection laser obtained by employing a microwave modulating signal (2 GHz) in the pumping current circuit. It was found that strong modulation of the output intensity of the laser operating at a slight excess over the threshold produced multimode emission with the same random distribution of the modes as in the case of spontaneous pulsations.