Acta Optica Sinica, Volume. 32, Issue 11, 1128005(2012)
Fiber Bending Sensor Based on LP21 Mode
A novel fiber optic bending sensor based on LP21 mode is developed. A fiber affixed onto an elastic substrate is used to sense bending angles in the real time by measuring rotation of LP21 mode spot image. Theoretical analysis is given by fiber coupled-mode theory combining with elastic-optic theory. Relation between spot-rotation angle and sensor bending angle for different structures and temperatures is tested. The experimental results agree with theoretical analysis and validate the accuracy of the sensor. The sensor is temperature-immune and can detect bending direction as well as bending angles with a large dynamic range.
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Fan Yuqiang, Yuan Yufeng, Wei Wanting, Chen Xin, Wu Xingkun. Fiber Bending Sensor Based on LP21 Mode[J]. Acta Optica Sinica, 2012, 32(11): 1128005
Category: Remote Sensing and Sensors
Received: May. 2, 2012
Accepted: --
Published Online: Sep. 14, 2012
The Author Email: Yuqiang Fan (fannike@126.com)