Abstract
Electronic-controlled routes to chaos in a quantum-well laser diode are produced using a delayed-feedback technique. By introducing an extra delayed-feedback control term cSn(t-τ), chaotic light output can be achieved at a relatively low bias and a small modulation depth. The interaction between external modulation and delay forms quasi-two-period routes to chaos by varying modulation amplitude b and intermittency routes to chaos by varying modulation frequency f0. Numerical analysis and experimental results agree qualitatively.
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