Temperature and strain sensing characteristics of the tilted fiber Bragg grating

Abstract

Theoretical and experimental studies on the tilted fiber Bragg grating (TFBG) temperature and strain sensing characteristics are conducted. The TFBG is stuck to the surface of the beam along the axis direction. When the free end of the beam is forced, both the strain and temperature will induce wavelength shifts. The temperature characteristic of TFBG cladding modes is similar to that of the core mode while the strain characteristics of TFBG core mode and cladding modes are different. A novel method to discriminate the temperature and strain simultaneously is put forward based on TFBG sensing characteristics.

Keywords

Wavelength Shift / Core Mode / Thermal Sensitivity / Strain Characteristic / Lightwave Technology

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This work has been supported by the National Natural Science Foundation of China (No. 60736079) and the Education Foundation of Tianjin (Nos. 20060609 and 2006BA28).