Theoretical model of optical fiber secure communication system with chaotic multiple-quantum-well lasers

Abstract

Chaotic synchronization of injected multiple-quantum-well lasers of optical fiber system and a theoretical model of optical fiber chaotic secure communication system are presented by coupling a chaotic multiple-quantum-well laser synchronization system and a fiber channel. A new chaotic encoding method of chaos phase shift keying On/Off is proposed for optical fiber secure communications. Chaotic synchronization is achieved numerically in long-haul fiber system at wavelength 1.55 μm. The effect of the nonlinear-phase of fiber is analyzed on chaotic signal and synchronization. A sinusoidal signal of 0.2 GHz frequency is simulated numerically with chaos masking in long-haul fiber analog communication at wavelength 1.55 μm while a digital signal of 0.5 Gbit/s bit rate is simulated numerically with c¹ haos masking and a rate of 0.05 Gbit/s are also simulated numerically with chaos shift keying and chaos phase shift keying On/Off in long-haul fiber digital communications at wavelength 1.55 μm

References

[1] ColetP., RoyR.. Opt. Lett., 1994, 19: 2056

[2] WuL., ZhuS.Q.. Chinese Physics, 2003, 12: 300

[3] ArgyrisA., SyvridisD.. J. lightwave Technology., 2004, 22: 1272

[4] BuldúJ.M., OjalvoJ.G., TorrentM.C.. IEEE J.Quantum Electron., 2005, 41: 164

[5] DimitrisK., ApostolosA., SyviridisD.. J. Lightwave Technology, 2003, 21: 750

[6] TrogerJ., ThvennazL., NicatiP.A., RobertP.A.. J. Lightwave Technology., 1999, 17: 629

[7] YanS.L.. Acta Electron.Sin., 2005, 33: 266