Transient Processes in Semiconductor Injection Lasers with Strong Optical Coupling
A time-scanning image converter with a resolution of 5 · 10-12 sec was used to observe the interaction between gallium arsenide injection lasers sharing a common junction. A strong optical coupling was maintained through those regions of the junction which were shared by the resonators of different lasers. The absolute value of the absorption coefficient of these regions decreased under the saturating effect of the radiation field of any of the lasers. Finally, this resulted in the switching on or off of one of the lasers by the optical signals of the other lasers. The characteristic times of the transient (switching) processes were of the order of 10-10 sec and the durations of the emitted light pulses were of the same order.
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