Title :
Experimental evaluation of an open-loop all-optical chaotic communication system
Author :
Argyris, A. ; Kanakidis, D. ; Bogris, A. ; Syvridis, D.
Author_Institution :
Dept. of Informatics & Telecommun., Univ. of Athens, Greece
Abstract :
An experimental investigation of the performance of an open-loop optical chaotic communication system has been carried out under different optical injection conditions. The most popular message encoding techniques have been considered, tested and compared at gigabit rates and for different levels of optical injection to the receiver, by bit-error-rate (BER) measurements. Different low-pass electrical filters have been implemented for the various message bit-rates tested, in order to employ the most appropriate one for message decoding. The best performance of all the examined encryption methods for messages of 1.5 Gb/s bit-rate emerged for the chaos modulation encryption method and was characterized by Q-factor values up to 5.1, after synchronizing in the strong injection regime, while the corresponding BER of the decoded message was as low as 7/spl middot/10/sup -5/. In order to confirm the secure encryption of the message, BER measurements are also performed for the chaotic carrier into which the message is encrypted.
Keywords :
Q-factor; chaotic communication; cryptography; decoding; error statistics; low-pass filters; optical chaos; optical fibre communication; optical modulation; optical receivers; semiconductor lasers; 1.5 Gbit/s; Q -factor; all-optical communication system; bit-error-rate measurements; chaos modulation encryption; chaotic carrier; chaotic communication system; encryption methods; low-pass electrical filters; message bit-rates; message decoding; message encoding; open-loop communication system; optical injection conditions; receiver; secure encryption; semiconductor lasers; Bit error rate; Chaotic communication; Cryptography; Decoding; Encoding; Low pass filters; Optical filters; Optical receivers; Q factor; Testing; Bit-error-rate (BER); chaotic communication system; encoding methods; semiconductor lasers; strong injection;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2004.837224
