Rayleigh-Based Distributed Optical Fiber Sensing

Distributed optical fiber sensing is a unique technology that offers unprecedented advantages and performance, especially in those experimental fields where requirements such as high spatial resolution, the large spatial extension of the monitored area, and the harshness of the environment limit the applicability of standard sensors. In this paper, we focus on one of the scattering mechanisms, which take place in fibers, upon which distributed sensing may rely, i.e., the Rayleigh scattering. One of the main advantages of Rayleigh scattering is its higher efficiency, which leads to higher SNR in the measurement; this enables measurements on long ranges, higher spatial resolution, and, most importantly, relatively high measurement rates. The first part of the paper describes a comprehensive theoretical model of Rayleigh scattering, accounting for both multimode propagation and double scattering. The second part reviews the main application of this class of sensors.

Automated summary

This paper discusses the unique technology of distributed optical fiber sensing and the Rayleigh scattering as one of the important scattering mechanisms. Rayleigh scattering has advantages such as high efficiency, high SNR, and high measurement rate, making it suitable for long-distance measurements and high spatial resolution.