Simultaneous measurement of strain and temperature incorporating a long-period fiber grating inscribed on a polarization-maintaining fiber

Simultaneous measurement of strain and temperature was demonstrated by using a long-period fiber grating inscribed on a polarization-maintaining fiber (PM-LPG). The spectral sensitivities of the two adjacent resonant dips of the PM-LPG were measured with respect to strain and temperature. The sensitivities of each resonant dip for strain and temperature were different in magnitude and sign, which makes this PM-LPG have a capability of simultaneously sensing strain and temperature. Experimental results show root mean square deviations of 15.6 /spl mu//spl epsiv/ and 0.7/spl deg/C for strain and temperature, respectively.

[1]  Lei Xu,et al.  Simultaneous strain and temperature measurements with fiber Bragg grating written in novel Hi-Bi optical fiber , 2004 .

[2]  Michael A. Davis,et al.  Fiber grating sensors , 1997 .

[3]  Byoungho Lee,et al.  Simultaneous Measurement of Temperature and Strain Using Two Fiber Bragg Gratings Embedded in a Glass Tube , 1997 .

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

[5]  J. Lee,et al.  Simultaneous measurement of strain and temperature by use of a single-fiber Bragg grating and an erbium-doped fiber amplifier. , 1999, Applied Optics.

[6]  L. Ferreira,et al.  Simultaneous measurement of strain and temperature using Bragg gratings written in germanosilicate and boron-codoped germanosilicate fibers , 1999, IEEE Photonics Technology Letters.

[7]  J. Bayon,et al.  Long-period fibre grating as a wavelength selective polarisation element , 1997 .

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

[9]  B. Lee,et al.  Simultaneous measurement of strain and temperature by use of a single fiber Bragg grating written in an erbium:ytterbium-doped fiber. , 2000, Applied optics.

[10]  Orlando Frazão,et al.  Sampled fibre Bragg grating sensors for simultaneous strain and temperature measurement , 2002 .

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