Effect of source and load resistance on the performance of bistable lasers

The effect of source and load resistances on the bistable behavior of multi quantum-well laser diodes is studied. Lower values of source resistance are found to affect the threshold current with a slight change in the hysteris is width. Also, the turn ON delay is found to decrease exponentially with t he increase in source resistance, Lower values of load resistance leads to smaller hysterisis width, and for values less than 125 Omega, for the devic e under study with an input resistance (R-in) of 1 Omega, an astable behavi or is observed when triggered by an electrical pulse in the gain section.