We conducted a computer simulation study to assess the effects of Stimulated Brillouin Scattering (SBS) on performance analysis of optical CDMA based on Enhanced Double Weight (EDW) code. It has been observed that SBS causes backward scattering of transmit signal and this in turn causes a reduction of received power and limitation improvement for the bit error rate. The maximum transmission distance is evaluated for optical CDMA based on BER equal to 10 -9 and transmitted power into fiber below SBS threshold power. Also in this paper, we demonstrate how the speed of data transfer, directly modulated technique and effective core area of optical fiber transmission influence the Brillouin threshold power in optical CDMA system.

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We conducted a experimental simulation study to assess the effects of Stimulated Brillouin Scattering (SBS) on an incoherent optical code division multiple access OCDMA (enhanced double weight EDW-code) system of one and two user at 1 Gb/s over optical fiber with two different transmission distances 30 km and 50 km. SBS causes backward scattering of pump light and this in turn causes a reduction of output power. It was found that the effects of SBS take place at small value of output power at longer distance because of the system have low threshold power value. The effects of SBS at two user OCDMA have a little effect as compared with one user.