Excitability and coherence resonance in passively Q-switched diode lasers

Johan L.A. Dubbeldam; Bernd Krauskopf; Daan Lenstra

doi:10.1117/12.391449

14 July 2000 Excitability and coherence resonance in passively Q-switched diode lasers

Johan L.A. Dubbeldam, Bernd Krauskopf, Daan Lenstra

Proceedings Volume 3944, Physics and Simulation of Optoelectronic Devices VIII; (2000) https://doi.org/10.1117/12.391449
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

A passively Q-switched laser produces regular pulses above threshold. Here we show that this type of laser, described by the Yamada model, exhibits excitability below threshold. There is a stable equilibrium, the off-solution, from which the system can be triggered by a sufficiently large, but small perturbation, to produce a single pulse after which it settles back to the off-solution. In order to study possible applications, such as pulse reshaping and clock recovery, we consider the reaction of the laser to a triggering input pulse. Furthermore, we demonstrate that when the laser is subjected to injected optical noise below threshold it reacts by producing a train of pulses, whose coherence is maximal and, equivalently, the normalized jitter is minimal for a particular noise level. This shows that the Yamada model with optically injected noise constitutes an example of all-optical coherence resonance.

Citation Download Citation

Johan L.A. Dubbeldam, Bernd Krauskopf, and Daan Lenstra "Excitability and coherence resonance in passively Q-switched diode lasers", Proc. SPIE 3944, Physics and Simulation of Optoelectronic Devices VIII, (14 July 2000); https://doi.org/10.1117/12.391449

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