Title :
Performance improvement of secure chaotic optical communications utilizing symmetrical dispersion compensation technique
Author :
Zhao, Qingchun ; Liu, Peiyang ; Yin, Hongxi
Author_Institution :
Lab. of Opt. Commun. & Photonic Technol., Dalian Univ. of Technol., Dalian, China
Abstract :
The purpose of this paper is to numerically study performance improvement of single-channel secure chaotic optical communications utilizing symmetrical dispersion compensation technique. The decrypted 1.25-Gbits/s non-return-tozero (NRZ) sequence at the receiver side becomes rather distorting after the transmission of 200-km dispersion shifted fiber. However, the quality of decrypted sequence is significantly improved by allocating dispersion compensation fiber. The results show that the Q-factors of the latter dispersion compensation period are smaller than that of the former ones. This is mainly due to the self-phase modulation (SPM) induced by the nonlinear coefficient of fiber. The results also indicate that the Q-factors increase in different degrees for three sequences of different bit rates.
Keywords :
cryptography; optical chaos; optical fibre communication; optical fibre dispersion; optical receivers; self-phase modulation; Q-factors; bit rate 1.25 Gbit/s; decrypted non-return-to-zero sequence; dispersion shifted fiber; distance 200 km; fiber nonlinear coefficient; receiver side; secure chaotic optical communication; self-phase modulation; symmetrical dispersion compensation technique; Abstracts; Chaotic communication; Erbium-doped fiber amplifier; ISO; Optical fiber communication; Optical fibers; Chaotic optical communications; Q-factor; dispersion compensation; fiber-optic;
Conference_Titel :
Communications and Photonics Conference and Exhibition, 2011. ACP. Asia
Conference_Location :
Shanghai
Print_ISBN :
978-0-8194-8961-6
