Temperature and strain discrimination using a single tilted fibre Bragg grating

OPTICS COMMUNICATIONS

卷:275

Article

Chehura, Edmon ; James, Stephen W. ; Tatam, Ralph P.

关键词: temperature;    strain;    sensor;    tilted fibre Bragg grating;    FBG;    TFBG;   

DOI  :  10.1016/j.optcom.2007.03.043

来源: Elsevier

【 摘 要 】

A fibre optic sensor capable of discriminating between temperature and strain, using a single fibre Bragg grating, is presented. The technique exploits the core-cladding mode coupling of a tilted fibre Bragg grating (TFBG). The core and cladding modes exhibit different thermal sensivities, while the strain sensivities are approximately equal. Monitoring the core-core mode coupling resonance and the core-cladding mode coupling resonance of the TFBG spectrum allows the separation of the temperature and strain induced wavelength shifts. (c) 2007 Elsevier B.V. All rights reserved.

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