Design and Analysis of Stimulated Brillouin Scattering in Fiber Optic System for Distributed Sensing Using Optisystem

Distributed fiber optic sensor based on Brillouin scattering has become increasingly popular due to its advantage of simultaneously measuring temperature and strain. The Stimulated Brillouin Scattering (SBS) threshold, sensing distance, signal-to-noise ratio and spatial resolution are critical parameters to the performance of Brillouin Optical Time Domain Reflectometry (BOTDR sensor. The result had shown SBS suppression by 4 dB to achieve the maximum sensing distance of up to 60 km using opti-system. Besides, a 3-bit simplex coding is employed when launching the laser pulses to enhance the SNR at the receiver.