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Spectral efficiency of OCDMA systems with coherent pulsed sources

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2 Author(s)
Rochette, M. ; Electr. & Comput. Eng. Dept., Univ. Laval, Ste. Foy, Que., Canada ; Rusch, L.A.

We present a model to evaluate the upper limit of the spectral efficiency of optical code-division multiple-access (OCDMA) systems with coherent sources. Phase-encoded and direct-sequence OCDMA systems are evaluated using this model. The results show that a spectral efficiency of 2.24×10-2 b/s· Hz can be achieved with a maximum bit error rate of 10-10 in these systems of the number of users. This result demonstrates that the maximum spectral efficiency of OCDMA systems with coherent sources is at least a factor of 5 higher than OCDMA systems with incoherent sources.

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Lightwave Technology, Journal of  (Volume:23 ,  Issue: 3 )