Theoretical Investigation of Distributed Fiber Optic Sensing: Brillouin Stimulated Scattering

Abstract

The primary function of monitoring systems is to ensure the operational integrity and safety of the system being monitored. Continuous monitoring provides timely information on the state of the monitored system as well as early warning of anomalies that might lead to catastrophic failures. One of the leading sensing technologies that is gaining wide acceptance in the industry is fiber optic-based sensing technology. This technology enables the fiber optic cable to act as a sensor, providing continuous sensing with wide sensing coverage and advanced warning capabilities in real-time. When utilized in a distributed configuration, it detects changes in vibration, strain, and temperature along the monitored object. The strain on an offshore crude pipeline may indicate the presence of fractures; recognizing them early can prevent structural collapse, which might lead to a leak and, eventually, an oil spill, inflicting environmental damage. This chapter presents a theoretical analysis of fiber optic-based sensing and its practical applications.