Open AccessSimultaneous bandwidth-enhanced and time delay signature-suppressed chaos generation in semiconductor laser subject to feedback from parallel coupling ring resonators
Author(s) -
Ning Jiang,
Yajun Wang,
Anke Zhao,
Shiqin Liu,
Yiqun Zhang,
Lu Chen,
Baochuan Li,
Kun Qiu
Publication year - 2020
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.385889
Subject(s) - bandwidth (computing) , resonator , physics , optics , semiconductor laser theory , wideband , nonlinear system , chaotic , coupling (piping) , laser , coupling coefficient of resonators , optical chaos , semiconductor , computer science , optoelectronics , materials science , telecommunications , quantum mechanics , artificial intelligence , metallurgy
We propose and demonstrate an external-feedback semiconductor laser-based chaos generation scheme supporting simultaneous bandwidth enhancement and excellent time-delay-signature (TDS) suppression, by using parallel-coupling ring resonators (PCRR) as reflector. The characteristics of effective bandwidth and TDS of chaotic signals generated in three indicative PCRR configurations are thoroughly investigated. The numerical results demonstrate that with the nonlinear feedback of PCRR, the TDS of chaos can be efficiently suppressed toward an indistinguishable level, and the bandwidth of chaos in the proposed scheme can also be enhanced, with respect to the conventional optical feedback configuration. The proposed scheme shows a flexible way to generate wideband complex chaos.