Abstract: In this work we analyze numerically the dynamic behavior of directly modulated semiconductor lasers. We study the output response of the laser as the amplitude of a sinusoidal modulation current is varied at fixed bias point and modulation frequency. We show that, as in previous studies, a period doubling route to chaos can be found in the laser dynamics. Also, as in recent experiments reporting chaos in laser diodes, we have found a period tripling solution in the laser diode response. !6
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