Abstract The digital communication of two-dimensional messages is investigated when two solid state multi-mode chaotic lasers are employed in a master-slave configuration. By introducing the time derivative of intensity difference between the receiver (carrier) and the transmittal (carrier plus signal), several signals can be encoded into a single pulse. If one signal contains several binary bits, two-dimensional messages in the form of a matrix can be encoded and transmitted on a single pulse. With these improvements in secure communications using chaotic multi-mode lasers, not only the transmission rate can be increased but also the privacy can be enhanced greatly.
Received: 23 February 2005
Revised: 14 April 2005
Accepted manuscript online:
Fund: Project supported by the Natural Science Foundation of Jiangsu Province, China (Grant No BK2001138).
Cite this article:
Zhou Yun (周云), Wu Liang (吴亮), Zhu Shi-Qun (朱士群) Digital communication of two-dimensional messages in a chaotic optical system 2005 Chinese Physics 14 2196
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