Comparison of Laguerre-Gaussian and Hermite-Gaussian Modes for Optical-CDMA over Multi-Mode Fiber

Abstract

Optical fiber became essential in telecommunication networks long-distance data transmissions because of its great features such as large bandwidth and long transmission distance. However different profile mode in the optical fiber communication system has different features that provide better results through Multi-mode fiber (MMF). This paper proposes a comparison of different modes for optical code division multiple access (Optical-CDMA) based on one dimension zero cross-correlation (ZCC) code over multi-mode fiber (MMF) transmission system for short haul-local area network. Furthermore Optical-CDMA system transmitted data based on Spatial VCSEL that operate over wavelength 1550 nm. The system is carried out by using three Laguerre-Gaussian modes (LG 01 LG 02 and LG 0 3) and compare with three Hermite-Gaussian modes (HG 01 HG 02 and HG 0 3) based on 1D-ZCC codes. Over different distance comparison of different modes in Optical-CDMA has evaluated the performance based on eye diagrams bit-error rates (BER) and Q-Factor measurement. The findings show that the proposed system demonstrates good performance over more distance MMF based on Laguerre-Gaussian modes.