Photonic Sensors, Volume. 4, Issue 1, 92(2014)
Refractive Index and Strain Sensitivities of a Long Period Fiber Grating
A long period fiber grating (LPFG) fabricated upon the all-solid photonic bandgap fiber by CO2 laser irradiation was investigated, and its resonance wavelength was at 1335.76 nm with a modulation depth of 15 dB and a 3-dB bandwidth of 2.6 nm. We studied its strain, temperature, and index sensor characteristics, the strain sensitivity of 0.992 pm/με was obtained by using linear fit, and the relationship between the refractive index and wavelength obeyed the distribution of quadratic function. Also, we demonstrated its temperature response was relatively insensitive (21.51 pm/℃).
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Quandong HUANG, Yongqin YU, Zhilong OU, Xue CHEN, Jishun WANG, Peiguang YAN, and Chenlin DU. Refractive Index and Strain Sensitivities of a Long Period Fiber Grating[J]. Photonic Sensors, 2014, 4(1): 92
Received: Sep. 5, 2013
Accepted: Sep. 20, 2012
Published Online: Jan. 2, 2014
The Author Email: YU Yongqin (yuyq@szu.edu.cn)