Title :
Spectral amplitude-coding optical CDMA system using Mach-Zehnder Interferometers
Author :
Lin, Cheing-Hong ; Wu, Jingshown ; Tsao, Hen-Wai ; Yang, Chun-Liang
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
4/1/2005 12:00:00 AM
Abstract :
In this paper, we propose a family of newly constructed codes to suppress the phase-induced intensity noise (PIIN) in spectral amplitude-coding (SAC) optical code division multiple access (OCDMA) systems. These new codes are derived from modified prime codes and their cross-correlation is not larger than one. We also present a novel SAC-OCDMA system employing the new codes together with Mach-Zehnder interferometers to eliminate the multi-user interference (MUI). Compared with the systems employing modified quadratic congruence codes (MQC codes), numerical results verify that our proposed system can more effectively suppress the PIIN and eliminate MUI. Hence, the number of simultaneously users and total transmission rate increases significantly.
Keywords :
Mach-Zehnder interferometers; code division multiple access; codes; optical fibre communication; Mach-Zehnder interferometers; cross-correlation; modified prime codes; modified quadratic congruence codes; multiuser interference; optical CDMA system; optical code division multiple access; phase-induced intensity noise; spectral amplitude-coding; total transmission rate; Helium; High speed optical techniques; Interference elimination; Mach-Zehnder interferometers; Multiaccess communication; Noise level; Optical interferometry; Optical noise; Phase noise; System performance; Mach–Zehnder interferometer; Optical code-division multiple access (OCDMA); modified prime codes; multi-user interference (MUI); spectral amplitude coding (SAC);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2005.844205
