Tuning characteristics and inverter/inverted-output flip-flop operation of tandem-electrode laser diode

The letter discusses the novel bistability which is experimentally observed in the tuning characteristic of a tandemelectrode laser diode (TE-LD). Using this tuning characteristic, inverter and inverted-output flip-flop operations are demonstrated between the source LD driving current and the TE-LD optical output. The tuning characteristic is applicable to optical logic devices having the inverter function.