Abstract Under certain icing load, the optical fiber of OPGW is seriously affected by stress, which will not only affect operation quality line communication, but also threaten its own and safety, such as cable breaking, tower falling other accidents. At present, OTDR mainly used to test path loss in after icing, that can’t reflect judge damage state accurately. In this paper, a method combinin...

Spatial resolution improvement from an acquired measurement using long pulse is developed for Brillouin optical time domain analysis (BOTDA) systems based on the total variation deconvolution algorithm. The frequency dependency of gain temporal envelope investigated by simulation, and its impact recovered results algorithm thoroughly analyzed. To implement a reliable process, differential pulse...