Two novel fiber Bragg grating (FBG) based sensing schemes are proposed and experimentally demonstrated for directional bending measurement: One of which is based on two weakly titled Bragg gratings spliced together with tilt planes at nearly 90 degree, followed by a cleaved end mirror; the other one is based on an off-Axis printed FBG, which both exhibit large amount of cladding modes in transmission spectrum in contrast with that of a normal FBG. Well-chosen cladding resonances in these two structure are demonstrated respectively for ultra-sensitive bending measurement via power detection. Meanwhile the surrounding temperature is proven independent to fiber bent.

Additional Metadata
Keywords bending measurement, fiber Bragg grating, Optics fiber sensor
Persistent URL
Conference 15th International Conference on Optical Communications and Networks, ICOCN 2016
Feng, D. (Dingyi), Qiao, X. (Xueguang), & Albert, J. (2017). Novel optical fiber Bragg grating designs for vector bending measurement. In ICOCN 2016 - 2016 15th International Conference on Optical Communications and Networks. doi:10.1109/ICOCN.2016.7875685