Design and analysis of a dynamic code division multiple access communication system based on tunable optical filter

A dynamic optical code division multiple access (DOCDMA) communication system is proposed for high-bandwidth communication systems. An implementation of the system is proposed based on a fast tunable optical filter (TOF) in each encoder and decoder. This technique actively modulates the central wavelength of a TOF according to a functional code at the transmitter during the bit period before the transmission of the data. The system is modeled and analyzed taking into account multiple access interference (MAI), thermal noise, and phase-induced intensity noise (PIIN). The performance of this system is compared to that of a spectral amplitude coding system that uses either a Hadamard code or a modified quadratic congruence (MQC) code. The results show that the proposed DOCDMA system reduces the PIIN effect on the performance of the system and improves the bit error rate (BER) performance at a large number of users. Furthermore, it is found that when the effective power is large enough, the MAI becomes the main factor that limits system performance, whereas when the effective power is relatively low, both thermal noise and PIIN become the main limiting factors with thermal noise having the main influence.

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

[2]  I. R. Croston,et al.  Lithium niobate electro-optic tunable filter with high sidelobe suppression , 1993 .

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

[4]  David D. Sampson,et al.  Photonic code-division multiple-access communications , 1997 .

[5]  E. Marom.  Optical delay line matched filters , 1977 .

[6]  N. Wada,et al.  A 10 Gb/s optical code division multiplexing using 8-chip optical bipolar code and coherent detection , 1999 .

[7]  Wing C. Kwong,et al.  Ultrafast All-Optical Code-Division Multiple-Access (CDMA) Fiber-Optic Networks , 1994, Comput. Networks ISDN Syst..

[8]  Ivan Glesk.  Demonstration of differentiated service provisioning with 4-node 253G chip/s fast frequency-hopping time-spreading OCDMA , 2004 .

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

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

[11]  C. F. Lam,et al.  Experimental demonstration of bipolar optical CDMA system using a balanced transmitter and complementary spectral encoding , 1998, IEEE Photonics Technology Letters.

[12]  David D. Sampson,et al.  Photonic CDMA by coherent matched filtering using time-addressed coding in optical ladder networks , 1994 .

[13]  H. Ghafouri-Shiraz,et al.  Proposal of a novel code for spectral amplitude-coding optical CDMA systems , 2002, IEEE Photonics Technology Letters.

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

[15]  J. Salehi,et al.  Analytical comparison of various fiber-optic CDMA receiver structures , 2000, Journal of Lightwave Technology.

[16]  S.L. Woodward,et al.  DBR-based tunable optical filter , 1990, IEEE Photonics Technology Letters.

[17]  H. Suzuki,et al.  Fast tunable optical filter using cascaded Mach-Zehnder Interferometers with apodized sampled gratings , 2005, IEEE Photonics Technology Letters.

[18]  D. Uttamchandani,et al.  Self-homodyne code division multiple access technique for fiber optic local area networks , 1994, IEEE Photonics Technology Letters.

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

[20]  D. Sadot,et al.  Tunable optical filters for dense WDM networks , 1998, IEEE Commun. Mag..

[21]  Leslie A. Rusch,et al.  Multirate optical fast frequency hopping CDMA system using power control , 2002 .

[22]  J. Goodman,et al.  Optical fiber delay line signal processing , 1984 .

[23]  H. Ghafouri-Shiraz,et al.  Codes for spectral-amplitude-coding optical CDMA systems , 2002 .

[24]  Dan Sadot.  Ultra-fast tunable fiber-loop optical filters for dense WDM applications , 1997 .

[25]  Yoshitaka Ohiso,et al.  A high-speed tunable optical filter using a semiconductor double-ring resonator , 2002, Conference Proceedings. 14th Indium Phosphide and Related Materials Conference (Cat. No.02CH37307).

[26]  Deepak Uttamchandani,et al.  Optical Fiber Code Division Multiple Access Networks: A Review , 1996 .

[27]  O. Sahlen,et al.  Active DBR filters for 2.5 Gb/s operation: linewidth, crosstalk, noise, and saturation properties , 1992 .

[28]  Leslie A. Rusch,et al.  Passive optical fast frequency-hop CDMA communications system , 1999 .

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

[30]  R R Syms,et al.  High-speed optical signal processing potential of grating-coupled waveguide filters. , 1991, Applied optics.

[31]  A. Holmes,et al.  All-optical CDMA using 'quasi-prime' codes , 1992 .

[32]  David D. Sampson,et al.  Coherence coding for photonic code-division multiple access networks , 1995 .

[33]  M.K. Abdullah,et al.  A new family of optical code sequences for spectral-amplitude-coding optical CDMA systems , 2004, IEEE Photonics Technology Letters.

[34]  David A. Jackson,et al.  Coherent optical fiber communications system using all-optical correlation processing. , 1990, Optics letters.

[35]  Zou Wei,et al.  Unipolar codes with ideal in-phase cross-correlation for spectral amplitude-coding optical CDMA systems , 2002, IEEE Trans. Commun..

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

[37]  Eli Yablonovitch,et al.  Fast-wavelength-hopped CDMA system for secure optical communications , 1998, Other Conferences.

[38]  Dan Sadot.  Ultrafast tunable fiber-loop optical filters for dense WDM applications , 1997, Other Conferences.

[39]  Hen-Wai Tsao,et al.  Spectral amplitude-coding optical CDMA system using Mach-Zehnder Interferometers , 2005 .

[40]  Paul R. Prucnal,et al.  12.5 Gbit/s fibre-optic network using all-optical processing , 1987 .

[41]  H.M.H. Shalaby,et al.  New code families for fiber-Bragg-grating-based spectral-amplitude-coding optical CDMA systems , 2001, IEEE Photonics Technology Letters.

[42]  Ming C. Wu,et al.  Spectrally encoded CDMA system using Mach-Zehnder encoder chains , 1998, Other Conferences.