Focused femtosecond laser pulses are used to create scattering damage in the core of polymer optical fibers (POF). The resulting structures are investigated regarding morphology by light microscopy and backscattered intensity using optical time domain reflectometry (OTDR). Quasi-distributed optical fiber sensing is proposed by evaluating backscatter changes at the inscribed scatter centers. Application examples for quasi-distributed measurement of fiber bends and temperature are demonstrated.
© 2013 IEEE
Sascha Liehr, Jörg Burgmeier, Katerina Krebber, and Wolfgang Schade, "Femtosecond Laser Structuring of Polymer Optical Fibers for Backscatter Sensing," J. Lightwave Technol. 31, 1418-1425 (2013)