Simultaneous measurement of temperature and strain based on a fiber Bragg grating with cladding made of electro-optic crystal material

Hang Fan; Yanjun Liu; Daobin Wang; Shanglin Hou

doi:10.1117/12.2249855

28 February 2017 Simultaneous measurement of temperature and strain based on a fiber Bragg grating with cladding made of electro-optic crystal material

Hang Fan, Yanjun Liu, Daobin Wang, Shanglin Hou

Author Affiliations +

Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102565I (2017) https://doi.org/10.1117/12.2249855
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China

Abstract

In this paper, a novel fiber Bragg grating (FBG) sensor which can measure the temperature and strain simultaneously is presented. The cladding layer of the proposed FBG sensor is made of a uniaxial crystal material (LiTaO₃) and the electric field is applied on the 1/2 area of the sensor. The sensing performance was investigated by the coupled-mode theory and dual-wavelength method. We found that the strain sensitivity and the temperature sensitivity of the 1/2 area with no electric field are 0.841 pm/με and 14.31 pm/°C respectively. If the electric field is increased from 0 to 400×10⁷ v/m, the temperature sensitivity of this device varies from 14.31 pm/°C to 14.12 pm/°C and its strain sensitivity varies from 0.841 pm/με to 0.850 pm/με. So, the obtained results demonstrate that the simultaneous measurement of temperature and strain can be achieved by using this scheme. The proposed sensor has potential applications in optical fiber sensing systems due to small size, high sensitivity and compatible with optical fiber.

Citation Download Citation

Hang Fan, Yanjun Liu, Daobin Wang, and Shanglin Hou "Simultaneous measurement of temperature and strain based on a fiber Bragg grating with cladding made of electro-optic crystal material", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102565I (28 February 2017); https://doi.org/10.1117/12.2249855

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