Increasing the number of users presents a limitation in one-dimensional (1D) spectral amplitude coding (SAC) for Optical Code Division Multiple Access (OCDMA) system. In order to overcome this disadvantage, a new architecture of the two-dimensional wavelength/spatial SAC-OCDMA system using the multi-diagonal (MD) code has been proposed. The 2D-MD code possesses the same properties of 1D-MD code, which leads to total suppression of the multiple access interference. Unlike conventional receivers used in precedent studies, where the phase-induced intensity noise (PIIN) is a drawback, the suggested structure not only eliminates PIIN but reduces the system architecture. The results show that the user’s number reached by the proposed system is the user number’s multiplication of the 1D system and the couplers’ number. Moreover, the new 2D-MD system presents good performances at the high data rate.
The evolution of data transmission using optical fiber media has been accelerated since the advent of technical multiplexing wavelengths (WDM), which helps to achieve bit rates of a few Tb/s transported by a single fiber. In this context, we propose in this work, to make a simulation of a system WDM, at 4·10Gb/s with the COMSIS simulator system. We will interest especially to demultiplexing.
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