Long-Period Fiber Grating Based Cantilever Strain Sensor

Cantilever Strain Sensor system based on long-period fiber grating (LPG) is presented. Strain response of the transmission intensity of the LPG is investigated. Experimental results show that a transmission intensity of LPG changed with the changing of the strain. And the main transmission intensity of the LPG unchanged, which can used to detect the temperature. The sensitivity of this sensor is up to 0.75 dB / N over a range from 0.5 to 5N. It indicates the LPG cantilever strain sensor is feasible to measure strain and temperature simultaneously.

[1]  John E. Sipe,et al.  Long-period fiber gratings as band-rejection filters , 1995 .

[2]  T. Erdogan,et al.  Leaky cladding mode propagation in long-period fiber grating devices , 1999, IEEE Photonics Technology Letters.

[3]  Ian Bennion,et al.  Fibre optic load sensors with high transverse strain sensitivity based on long-period gratings in B/Ge co-doped fibre , 1999 .

[4]  Byoungho Lee,et al.  Simultaneous measurement of strain and temperature incorporating a long-period fiber grating inscribed on a polarization-maintaining fiber , 2004, IEEE Photonics Technology Letters.

[5]  Turan Erdogan,et al.  Cladding-mode resonances in short- and long-period fiber grating filters , 2000 .

[6]  Ping Shum,et al.  Temperature-independent vibration sensor with a fiber Bragg grating , 2010 .

[7]  Jian-feng Wang,et al.  A Displacement Sensor Based on a Temperature-Insensitive Double Trapezoidal Structure With Fiber Bragg Grating , 2012, IEEE Sensors Journal.

[8]  Jianping Chen,et al.  Torsion characteristics of long-period fiber gratings induced by high-frequency CO2 laser pulses , 2005 .

[9]  Gia-Wei Chern,et al.  Corrugated long-period fiber gratings as strain, torsion, and bending sensors , 2001 .

[10]  Changyu Shen,et al.  Novel temperature-insensitive fiber Bragg grating sensor for displacement measurement , 2011 .

[11]  Limin Xiao,et al.  Highly sensitive long-period fiber-grating strain sensor with low temperature sensitivity. , 2006, Optics letters.

[12]  Li Yang,et al.  Unified Approach for Coupling to Cladding and Radiation Modes in Fiber Bragg and Long-Period Gratings , 2009, Journal of Lightwave Technology.