论文信息 - Simultaneous measurement of strain and temperature using single tilted fibre Bragg grating

Simultaneous measurement of strain and temperature using single tilted fibre Bragg grating

Tilted fibre Bragg grating (TFBG) with grating planes tilted at an angle of 3° corresponding to the fibre axis shows core mode and a large number of cladding-mode resonances in its transmission. Discriminating temperature and strain simultaneously using a single tilted fibre Bragg grating is proposed and demonstrated experimentally. The wavelength shifts of the TFBG in response to temperature and strain are investigated. The results show that the cladding modes and core mode have different strain sensitivities while the temperature sensitivities are equal. So, it is possible to monitor the core-mode resonance and the cladding-mode resonances of the TFBG spectrum, allowing the separation of the temperature and strain induced wavelength shifts.

[1] G.M. Williams,et al. Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination , 1996, IEEE Photonics Technology Letters.

[2] Ian Bennion,et al. Dependence of temperature and strain coefficients on fiber grating type and its application to simultaneous temperature and strain measurement. , 2002, Optics letters.

[3] V. Bhatia. Applications of long-period gratings to single and multi-parameter sensing. , 1999, Optics express.

[4] Ralph P. Tatam,et al. Thermal dependence of the strain response of optical fibre Bragg gratings , 2004 .

[5] K S Lee,et al. Fiber mode coupling in transmissive and reflective tilted fiber gratings. , 2000, Applied optics.

[6] Ian Bennion,et al. Quadratic behavior of fiber Bragg grating temperature coefficients. , 2004, Applied optics.

[7] John E. Sipe,et al. Tilted fiber phase gratings , 1996 .

[8] Ralph P. Tatam,et al. Simultaneous independent temperature and strain measurement using in-fibre Bragg grating sensors , 1996 .