TY - JOUR
T1 - Temperature-Strain Discrimination Sensor Using a WDM Chirped in-Fibre Bragg Grating and an Extrinsic Fabry-Pérot
AU - Yun-jiang, Rao
AU - Xiang-kai, Zeng
AU - Yong, Zhu
AU - Yi-ping, Wang
AU - Tao, Zhu
AU - Zeng-ling, Ran
AU - Lin, Zhang
AU - Bennion, Ian
PY - 2001/5/1
Y1 - 2001/5/1
N2 - A novel fibre-optic sensing system used for temperature-strain discrimination is presented. This system consists of an extrinsic Fabry-Pérot interferometric sensor (EFPI) and a chirped in-fibre Bragg grating (CFBG) in series. The EFPI and the CFBG are wavelength-division-multiplexed (WDM) to provide strain and temperature information, respectively. The wavelength-shift of the CFBG induced by temperature change in the 1.55 µm region is interrogated with an intensity-based scheme, allowing fast measurement of temperature. The cavity length change of the EFPI is measured in the 1.3 µm region, allowing strain to be measured without cross-talk from the temperature sensor, i.e. the CFBG. Experimental results show that the achieved accuracies for strain and temperature measurement are ±20×10-6 and ±2°C, respectively.
AB - A novel fibre-optic sensing system used for temperature-strain discrimination is presented. This system consists of an extrinsic Fabry-Pérot interferometric sensor (EFPI) and a chirped in-fibre Bragg grating (CFBG) in series. The EFPI and the CFBG are wavelength-division-multiplexed (WDM) to provide strain and temperature information, respectively. The wavelength-shift of the CFBG induced by temperature change in the 1.55 µm region is interrogated with an intensity-based scheme, allowing fast measurement of temperature. The cavity length change of the EFPI is measured in the 1.3 µm region, allowing strain to be measured without cross-talk from the temperature sensor, i.e. the CFBG. Experimental results show that the achieved accuracies for strain and temperature measurement are ±20×10-6 and ±2°C, respectively.
UR - https://iopscience.iop.org/article/10.1088/0256-307X/18/5/307
U2 - 10.1088/0256-307X/18/5/307
DO - 10.1088/0256-307X/18/5/307
M3 - Article
SN - 0256-307X
VL - 18
SP - 643
EP - 645
JO - Chinese Physics Letters
JF - Chinese Physics Letters
IS - 5
ER -