Empirical Analysis of the SAC-OCDMA-WDM System by Leveraging the AND Subtraction Technique

Abstract

This study utilized C-band carrier frequency to
evaluate Spectral Amplitude Coding Optical Code Division
Multiple Access (SAC-OCDMA) systems, employing Fiber Bragg
Gratings (FBG) as encoders and decoders and implementing the
AND subtraction detection technique. The system's performance
is influenced by various factors, including optical transmission
distance, optical power, channel bandwidth, data rate, and the
number of channels. Extensive simulations were conducted to
examine the impact of these parameters on system performance.
The proposed SAC-OCDMA system was integrated with a
Wavelength Division Multiplexing (WDM) system to increase the
number of active channels. The network was designed and
analyzed using commercially available Optisystem software. The
proposed SAC-OCDMA system architecture with two channels
maintained operational limits up to unrepeated transmission over
336 km at a data rate of 1.6 Gbit/s, achieving results within the
pre-FEC threshold. Additionally, the SAC-OCDMA system was
simulated with up to ten channels, considering the pre-FEC bit
error rate threshold. The results were compared with recent
technical articles and were found to be superior in terms of the
number of channels and transmission distance. The proposed
model achieved a superior data rate of 6.4 Gbps and a maximum
transmission distance of 24 km for a 10-channel architecture.