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Stable microwave oscillations due to external-cavity-mode beating in laser diodes subject to optical feedback

par Erneux, Thomas ;Gavrielides, A.;Sciamanna, Marc
Référence Physical Review A, 66, page (033809)
Publication Publié, 2002

Article révisé par les pairs

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Résumé :

Laser diodes subject to a delayed optical feedback may exhibit high-frequency oscillating intensities as a result of a beating between two external-cavity-modes (ECMs). We analyze the conditions for the stability of these microwave oscillations in the framework of the Lang-Kobayashi equations for a single-mode edge-emitting semiconductor laser [R. Lang and K. Kobayashi, IEEE J. Quantum Electron. QE-16, 347 (1980)]. We show that two different scenarios are possible. If the linewidth enhancement factor is relatively large the beating occurs between a stable ECM (mode) and an unstable ECM (antimode). The stability of the time-periodic solution is then limited in parameter space. But if the linewidth enhancement factor is sufficiently low a beating between two stable modes is possible allowing stable high-frequency oscillating outputs.