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Fiber optic bend and temperature sensing in femtosecond laserstructured POF

: Liehr, S.; Burgmeier, J.; Krebber, K.; Schade, W.


Liao, Y. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
22nd International Conference on Optical Fiber Sensors 2012. Vol.1 : 15 - 19 October 2012, Beijing, China; OFS-22
Bellingham, WA: SPIE, 2012 (Proceedings of SPIE 8421)
ISBN: 978-0-8194-9103-9
Paper 84213I
International Conference on Optical Fiber Sensors (OFS) <22, 2012, Beijing>
Fraunhofer HHI ()

We propose focused femtosecond laser irradiation to create stable and permanent scattering damage in large-core polymer optical fibers. Sensing applications using optical time domain reflectometry are discussed and presented. Experiments show that quasi-distributed fiber bend sensors and absolute temperature measurement can be realized by evaluating spatially resolved backscatter intensities.