Hailiang Zhang, Zhifang Wu, P. Shum, Xuguang Shao, Xuan Quyen Din, Ruoxu Wang, S. Fu, W. Tong, M. Tang
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Helical long period grating in multicore fiber for simultaneous measurement of torsion and temperature
We fabricate a helical long period grating (HLPG) in a multicore fiber. A fiber torsion sensor with directional discrimination based on the HLPG is experimentally demonstrated. The resonant dips offer the ability of simultaneously measurement of torsion and temperature.