Open AccessNonlinear dynamics in integrated coupled DFB lasers with ultra-short delay
Author(s) -
Dong Liu,
Changzheng Sun,
Bing Xiong,
Yi Luo
Publication year - 2014
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.22.005614
Subject(s) - nonlinear system , physics , oscillation (cell signaling) , coupling (piping) , laser , semiconductor laser theory , optics , group delay and phase delay , relaxation (psychology) , nonlinear optics , phase (matter) , dynamics (music) , materials science , telecommunications , quantum mechanics , computer science , acoustics , bandwidth (computing) , psychology , social psychology , genetics , metallurgy , biology
We report rich nonlinear dynamics in integrated coupled lasers with ultra-short coupling delay. Mutually stable locking, period-1 oscillation, frequency locking, quasi-periodicity and chaos are observed experimentally. The dynamic behaviors are reproduced numerically by solving coupled delay differential equations that take the variation of both frequency detuning and coupling phase into account. Moreover, it is pointed out that the round-trip frequency is not involved in the above nonlinear dynamical behaviors. Instead, the relationship between the frequency detuning Δν and the relaxation oscillation frequency νr under mutual injection are found to be critical for the various observed dynamics in mutually coupled lasers with very short delay.