Spectral amplitude-coding optical CDMA system using Mach-Zehnder Interferometers

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.

[1]  Fan Chung Graham,et al.  Optical orthogonal codes: Design, analysis, and applications , 1989, IEEE Trans. Inf. Theory.

[2]  Hossam M. H. Shalaby,et al.  Modified quadratic congruence codes for fiber Bragg-grating-based spectral-amplitude-coding optical CDMA systems , 2001 .

[3]  Jawad A. Salehi,et al.  Code division multiple-access techniques in optical fiber networks. I. Fundamental principles , 1989, IEEE Trans. Commun..

[4]  Wing C. Kwong,et al.  Performance comparison of asynchronous and synchronous code-division multiple-access techniques for fiber-optic local area networks , 1991, IEEE Trans. Commun..

[5]  Paul R. Prucnal,et al.  Spread spectrum fiber-optic local area network using optical processing , 1986 .

[6]  G.H.L.M. Heideman,et al.  A generalization of a coherence multiplexing system , 2000, IEEE Benelux Chapter on Vehicular Technology and Communications. Symposium on Communications and Vehicular Technology. SCVT-2000. Proceedings (Cat. No.00EX465).

[7]  Xiang Zhou,et al.  Code for spectral amplitude coding optical CDMA systems , 2000 .

[8]  David D. Sampson,et al.  Capacity of coherence multiplexed CDMA networks , 1996, Summaries of papers presented at the Conference on Lasers and Electro-Optics.

[9]  Mohsen Kavehrad,et al.  Optical code-division-multiplexed systems based on spectral encoding of noncoherent sources , 1995 .

[10]  Desmond P. Taylor,et al.  Performance enhancement of spectral-amplitude-coding optical CDMA using pulse-position modulation , 1998, IEEE Trans. Commun..

[11]  Jean-Pierre Goedgebuer,et al.  Analysis of optical crosstalk in coherence multiplexed systems employing a short coherence laser diode with arbitrary power spectrum , 1990 .

[12]  Jingshown Wu,et al.  Perfect difference codes for synchronous fiber-optic CDMA communication systems , 2001 .

[13]  Jawad A. Salehi,et al.  Code division multiple-access techniques in optical fiber networks. II. Systems performance analysis , 1989, IEEE Trans. Commun..