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In-Fiber Twist Sensor Based on a Fiber Bragg Grating With 81 ^{\circ} Tilted Structure

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4 Author(s)
X. Chen ; Dept. of Electron. Eng., Aston Univ., Birmingham ; K. Zhou ; L. Zhang ; I. Bennion

We report a strong polarization dependent coupling behavior of fiber Bragg gratings with excessively tilted structures up to 81deg. This unique property has been utilized to implement a novel twist sensor, showing high torsion sensitivity. The twist induced light coupling interchange between the two birefringence modes makes it possible to interrogate such a sensor using low-cost intensity demodulation technique

Published in:

IEEE Photonics Technology Letters  (Volume:18 ,  Issue: 24 )