Open AccessFlat broadband chaotic carrier generation and synchronization
Author(s) -
Xiujuan Zhang,
Bingjie Wang,
Yang Ling-Zhen,
Anbang Wang,
Dongming Guo,
Yuncai Wang
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.3203
Subject(s) - synchronization (alternating current) , chaotic , physics , bandwidth (computing) , broadband , laser , semiconductor laser theory , injection locking , coupling strength , optoelectronics , optics , computer science , telecommunications , channel (broadcasting) , artificial intelligence , condensed matter physics
The chaotic carrier with smooth spectrum and broad bandwidth is generated by a distributed feedback DFB semiconductor laser subject to unidirectional fiber ring optical feedback. The smooth spectrum of the obtained chaotic carrier hides the external cavity resonance frequency peaktherefore the security of the system is enhanced. By unidirectional couplingwe implement the stable chaos synchronization when the chaotic light is injected into a solitary DFB laser diode. The correlation coefficient of synchronization is 0.84. The effects of injection strength and optical frequency detuning on synchronization are investigated experimentally. The results show that in conditions of strong injected locking the synchronization can be achieved in a large range of frequency detuningand the stronger injection corresponds to the larger range of frequency detuning in which chaos synchronization maintains. The synchronization quality improves with the injection strength increasing.