Simulation of a modified dual Mach-Zehnder interferometric perimeter intrusion detection system

Abstract

This paper discusses the modeling and simulation of a modified dual Mach-Zehnder interferometric sensor based perimeter intrusion detection system. First, the operating principle of the phase modulation of the optical fiber is described and the basic Mach-Zehnder interferometer and the operating principle of modified dual Mach-Zehnder interferometric perimeter intrusion detection system (MDMZIPIDS) are described. A thorough simulation model of the system, considering its optic components and all possible noise sources are established in expanded matrix form. In order to conform to the realistic simulation model, a detailed derivation of the fence vibration pertinent to its physics and mechanical properties is discussed. Finally, this paper presents the simulation results of the system, and compare them with the experimental results. From this, non-ideal components cause only the magnitude difference ofthe outputs received by photodetectors in MDMZIPIDS. With visibility noise and the polarization-induced noise, the system will be affected somehow, and with a larger force, the accuracy of the estimated intrusion position will be higher.