Supports dual channel DAS vibration fiber. Supports simultaneous positioning and monitoring of multiple vibration points with high positioning accuracy of ± 5 m, frequency response range from 10 Hz to 5 kHz, and alarm response time ≤ 2 s. We pioneer the use of fiber optic vibration sensing to deliver railway insights across multiple disciplines. We monitor track condition, detect trespass and cable security events, and alert operators to natural hazards such as landslides or rock falls. We use Artificial Intelligence (AI), and. In this paper, various technologies of distributed fiber-optic vibration sensing are reviewed, from interferometric sensing technology, such as Sagnac, Mach–Zehnder, and Michelson, to backscattering-based sensing technology, such as phase-sensitive optical time domain reflectometer. NORSAR utilizes advanced Distributed Acoustic Sensing (DAS) to develop precise monitoring and secure solutions in areas ranging from avalanches and traffic to pipelines and water leaks. We have experience with distributed measurements of a wide range of parameters such as temperature, pressure, strain, shape, acoustics and chemicals. The main advantages of fibre optic.