Open AccessNonlinear dynamics of semiconductor lasers with feedback and modulation
Author(s) -
J. P. Toomey,
D. M. Kane,
Min Won Lee,
K.A. Shore
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.016955
Subject(s) - semiconductor laser theory , chaotic , modulation (music) , optics , nonlinear system , bandwidth (computing) , laser , physics , spectral density , semiconductor , computer science , telecommunications , optoelectronics , quantum mechanics , acoustics , artificial intelligence
The nonlinear dynamics of two semiconductor laser systems: (i) with optical feedback, and (ii) with optical feedback and direct current modulation are evaluated from multi-GHz-bandwidth output power time-series. Animations of compilations of the RF spectrum (from the FFT of the time-series) as a function of optical feedback level, injection current and modulation signal strength is demonstrated as a new tool to give insight into the dynamics. The results are contrasted with prior art and new observations include fine structure in the RF spectrum at low levels of optical feedback and non-stationary switching between periodic and chaotic dynamics for some sets of laser system parameters. Correlation dimension analysis successfully identifies periodic dynamics but most of the dynamical states are too complex to be extracted using standard algorithms.