A Simple Demodulation Method for FBG Temperature Sensors Using a Narrow Band Wavelength Tunable DFB Laser

A simple demodulation method for a fiber Bragg grating (FBG) temperature sensor is proposed and demonstrated, which uses a low cost commercial temperature-controlled wavelength scanning distributed-feedback (DFB) laser, a sensing FBG and a low-speed photodetector (PD). Relative high resolution is achieved by utilizing an FBG with enhanced temperature sensitivity design. Such a method may be suitable for applications requiring moderate resolution and low cost implementations.

[1]  R. Measures,et al.  A passive wavelength demodulation system for guided-wave Bragg grating sensors , 1992, IEEE Photonics Technology Letters.

[2]  A. Kersey,et al.  Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry - Perot wavelength filter. , 1993, Optics letters.

[3]  Alan D. Kersey,et al.  All-fibre Bragg grating strain-sensor demodulation technique using a wavelength division coupler , 1994 .

[4]  Alan D. Kersey,et al.  Application of a fiber Fourier transform spectrometer to the detection of wavelength-encoded signals from Bragg grating sensors , 1995 .

[5]  A. Kersey,et al.  Bragg grating-based laser sensors systems with interferometric interrogation and wavelength division multiplexing , 1995 .

[6]  S.W. James,et al.  Photorefractive volume holographic demodulation of in-fiber Bragg grating sensors , 1996, IEEE Photonics Technology Letters.

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

[8]  Raymond M. Measures,et al.  Arbitrary strain profile measurement within fibre gratings using interferometric Fourier transform technique , 1997 .

[9]  P. Ruffin,et al.  Fiber bragg grating strain sensor demodulation with quadrature sampling of a mach-zehnder interferometer. , 2000, Applied optics.

[10]  H.L. Ho,et al.  Performance analysis of a time-division-multiplexed fiber Bragg grating sensor array by use of a tunable laser source , 2000, IEEE Journal of Selected Topics in Quantum Electronics.

[11]  Ian Bennion,et al.  Fiber Bragg grating sensor interrogation using chirped fiber grating-based Sagnac loop , 2003 .

[12]  Mark G. Kuzyk.  Polymer Fiber Optics: Materials, Physics, and Applications , 2006 .

[13]  Qida Zhao,et al.  Time-Division Multiplexing Fiber Grating Sensor With a Tunable Pulsed Laser , 2006, IEEE Photonics Technology Letters.