Open AccessEffects of spontaneous emission noise in semiconductor lasers on chaotic optical communication systems
Author(s) -
Xiaofeng Li,
Wei Pan,
Da Ma,
Bin Luo,
Weili Zhang,
Xiong Yue
Publication year - 2006
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.55.5094
Subject(s) - chaotic , semiconductor laser theory , laser , optical communication , noise (video) , semiconductor , spontaneous emission , optoelectronics , semiconductor optical gain , physics , optics , computer science , image (mathematics) , artificial intelligence
A chaotic optical communication system based on external optical feedback is constructed. By introducing the Langevin noise sources, the master-slave rate equations including spontaneous emission noise characteristics are deduced. Utilizing the obtained mathematical model, two kinds of possible chaos synchronization in the system, i.e. complete chaos synchronization and generalized mode-locking chaos synchronization, are studied. The effects of the spontaneous emission noises of the two lasers on the two types of synchronization as well as the chaotic outputs of the transmitter and receiver are discucsed. Finally, for a sequence of pseudorandom digital bits at 2.5Gb/s bit rate, the encoding/decoding process basing on chaotic masking method is presented, and the effects of noise on decoding performance are examined.