论文信息 - Enhanced sensitivity fibre optic long period grating temperature sensor

Enhanced sensitivity fibre optic long period grating temperature sensor

In this paper we demonstrate a simple technique for forming a fibre optic long period grating (LPG) with enhanced temperature sensitivity by surrounding the LPG with a material with a high thermo-optic coefficient, thus exploiting both the temperature and external refractive index sensitivity of the LPG. The operating temperature and measurement ranges are determined by the attenuation band that is monitored, and the refractive index and the thermo-optic coefficient of the surrounding material.

[1] Robert S. Windeler,et al. Widely tunable long-period fibre gratings , 1999 .

[2] S. James,et al. Fiber-optic liquid-level sensor using a long-period grating. , 2001, Optics letters.

[3] S. Yin,et al. A highly sensitive long period grating based tunable filter using a unique double-cladding layer structure , 2001 .

[4] I. Bennion,et al. Optical bend sensor based on measurement of resonance mode splitting of long-period fiber grating , 2000, IEEE Photonics Technology Letters.

[5] R. Claus,et al. Temperature-insensitive and strain-insensitive long-period grating sensors for smart structures , 1997 .

[6] P. Ferdinand,et al. State-of-strain evaluation with fiber Bragg grating rosettes: application to discrimination between strain and temperature effects in fiber sensors. , 1997, Applied optics.

[7] Heather Patrick. Self-aligning bipolar bend transducer based on long period grating written in eccentric core fibre , 2000 .

[8] S. James,et al. Simultaneous temperature and bend sensing with long-period fiber gratings. , 2000, Optics letters.

[9] Alan D. Kersey,et al. Analysis of the response of long period fiber gratings to external index of refraction , 1998 .

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