External resonator turn-on time-delay effects with GaAs injection lasers at room temperature

Stimulated emission has been observed at the end of the current pulse for a GaAs injection laser operated with an external resonator at room temperature. It has been observed in the peak injection current range of 65- 95 A and for current pulse half-widths in the investigated range of 250-500 ns. This effect was found only when a diode was operated with the external resonator. Stimulated emission both during the current pulse and at the end of the current pulse also has been observed.