Directional coupling and bistability in four contact twin-stripe injection lasers

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Abstract
The paper reports on the optical switching operation of four contact twin-stripe injection lasers. Both directional coupling and cross coupling action have been demonstrated. Bistability involving a switch in the optical filament, between a cross coupled optical mode and a straight pass one, has also been observed. Electrical triggering of the bistable mechanism and optical switching between bistable states have been achieved with rejection ratios of up to 8:1.

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