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Proceedings Paper

Excitability and coherence resonance in passively Q-switched diode lasers
Author(s): Johan L.A. Dubbeldam; Bernd Krauskopf; Daan Lenstra
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Paper 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.

Paper Details

Date Published: 14 July 2000
PDF: 10 pages
Proc. SPIE 3944, Physics and Simulation of Optoelectronic Devices VIII, (14 July 2000); doi: 10.1117/12.391449
Show Author Affiliations
Johan L.A. Dubbeldam, Vrije Univ. (Netherlands)
Bernd Krauskopf, Univ. of Bristol (United Kingdom)
Daan Lenstra, Vrije Univ. (Netherlands)

Published in SPIE Proceedings Vol. 3944:
Physics and Simulation of Optoelectronic Devices VIII
Rolf H. Binder; Peter Blood; Marek Osinski, Editor(s)

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