论文信息 - Simultaneous measurement of temperature and strain based on arc-induced long-period fibre gratings

Simultaneous measurement of temperature and strain based on arc-induced long-period fibre gratings

Experimental results: To investigate the influence of the fabrication parameters on the properties of the LPFGs, several gratings were written in the SMF-28 Corning fibre using the electric arc technique (6). The fabrication parameters (fibre pulling tension, T; electric current, I; arc duration, t ;p eriod,L and the number of discharges, N )w ere as follows:T ¼1.2-36.3 mN, I ¼9-12 mA, t ¼1-2 s, L ¼540 m ma ndN ¼30-40. The spectral analysis of the produced gratings enabled us to conclude that the increase of the electric current or the arc duration shifts the spectra towards lower wavelengths, whilst the increase of the fibre pulling tension leads to an opposite displacement of the resonances. At the same time, an increase of those parameters contributes to the fabrication of gratings with deeper

Jose Luis Santos | Gaspar Rego | Henrique M. Salgado | Paulo Marques

[1] David J. Webb,et al. A comparison of the sensing characteristics of long period gratings written in three different types of fiber , 2003 .

[2] Y. Rao,et al. Novel fiber-optic sensors based on long-period fiber gratings written by high-frequency CO/sub 2/ laser pulses , 2003 .

[3] S. James,et al. Optical fibre long-period grating sensors: characteristics and application , 2003 .

[4] Henrique M. Salgado,et al. Simultaneous measurement of strain and temperature based on polarization loss properties of arc-induced long-period gratings , 2004, European Workshop on Optical Fibre Sensors.

[5] R O Claus,et al. Simultaneous strain and temperature measurement with long-period gratings. , 1997, Optics letters.

[6] E. Dianov,et al. High-temperature stability of long-period fiber gratings produced using an electric arc , 2001 .

[7] Byoungho Lee,et al. Simultaneous measurement of strain and temperature incorporating a long-period fiber grating inscribed on a polarization-maintaining fiber , 2004 .