Fiber-optic sensors effectively meet the vibration monitoring requirements of OPGW lines due to their resistance to electromagnetic interference and distributed monitoring capabilities. 5 By incorporating sensor technology into OPGW optical cables, parameters like. Vortex-induced vibration is the resonant, small-amplitude vibration caused by steady, low-velocity wind blowing across cables under mechanical tension. The mechanism causing cable vibration is the periodic aerodynamic force created by vortices, in the wake of the air on the leeward side of the. This paper proposes a distributed monitoring and forewarning method for OPGW abnormal vibrations using the long short-term memory (LSTM) algorithm, leveraging the regularity of abnormal vibrations related to climatic conditions. A distributed fiber Bragg grating array is employed to acquire. Optical fibers, also known as fibre-optic cables, ensure high precision and sensitivity in measurement technology. In combination with a sensor, they provide significant advantages in the detection of temperature, pressure, strain or vibration. Testing PMD is essential in order to characterize the fiber's suitability to support high speed transmission such as 10 Gb/s, 40 Gb/s or even 100 Gb/s. Norway targets 30 GW of offshore wind capacity allocated by 2040.