Experimental and numerical study of the symbolic dynamics of a modulated external-cavity semiconductor laser.


Journal Article

We study the symbolic dynamics of a stochastic excitable optical system with periodic forcing. Specifically, we consider a directly modulated semiconductor laser with optical feedback in the low frequency fluctuations (LFF) regime. We use a method of symbolic time-series analysis that allows us to uncover serial correlations in the sequence of intensity dropouts. By transforming the sequence of inter-dropout intervals into a sequence of symbolic patterns and analyzing the statistics of the patterns, we unveil correlations among several consecutive dropouts and we identify clear changes in the dynamics as the modulation amplitude increases. To confirm the robustness of the observations, the experiments were performed using two lasers under different feedback conditions. Simulations of the Lang-Kobayashi (LK) model, including spontaneous emission noise, are found to be in good agreement with the observations, providing an interpretation of the correlations present in the dropout sequence as due to the interplay of the underlying attractor topology, the external forcing, and the noise that sustains the dropout events.

Full Text

Cited Authors

  • Aragoneses, A; Sorrentino, T; Perrone, S; Gauthier, DJ; Torrent, MC; Masoller, C

Published Date

  • February 2014

Published In

Volume / Issue

  • 22 / 4

Start / End Page

  • 4705 - 4713

PubMed ID

  • 24663789

Pubmed Central ID

  • 24663789

Electronic International Standard Serial Number (EISSN)

  • 1094-4087

International Standard Serial Number (ISSN)

  • 1094-4087

Digital Object Identifier (DOI)

  • 10.1364/oe.22.004705


  • eng