Universal readout system for temperature, elongation and hydrostatic pressure sensors based on highly birefringent fibers

In this paper, we present a universal readout system, which can be used to decode polarimetric fiber-optic sensors based on highly birefringent fibers. All such sensors use the same sensing principle, relying upon the dependence of modal birefringence on different physical parameters. To register the measurand-induced phase changes between polarization modes, we use the coherence-addressing principle. This requires that the interrogated sensor be powered by a broadband source (superluminescent diode) and that the total optical path delay introduced by the sensor be balanced in the decoding interferometer. The system performance in decoding elongation, temperature and hydrostatic pressure sensing is demonstrated.

[1]  Wojtek J. Bock,et al.  Studies of temperature-insensitive dynamic pressure sensing using elliptical-core side-hole fibers , 2003, Other Conferences.

[2]  W J Bock,et al.  Contrast analysis for a fiber-optic white-light interferometric system. , 1997, Applied optics.

[3]  W. Bock,et al.  Digital demodulation system for low-coherence interferometric sensors based on highly birefringent fibers. , 2001, Applied optics.

[4]  W. Urbańczyk,et al.  Optimization of detection system for low-coherence interferometric sensors based on highly birefringent fibers. , 2001 .

[5]  R. Tatam,et al.  Passive signal processing for a miniature Fabry-Perot interferometric sensor with a multimode laser-diode source. , 1995, Optics letters.

[6]  Wojtek J. Bock,et al.  Performance analysis of a tandem of white-light fiber-optic interferometers , 1997 .

[7]  Sang K. Sheem,et al.  Optical fiber interferometers with [3×3] directional couplers: Analysis , 1981 .

[8]  Raymond M. Measures,et al.  Localized dual-wavelength fiber-optic polarimeter for the measurement of structural strain and orientation. , 1992, Applied optics.

[9]  J. P. Dakin,et al.  Compensated polarimetric sensor using polarisation-maintaining fibre in a differential configuration , 1984 .

[10]  W. Bock,et al.  Dynamic pressure sensing with a fiber-optic polarimetric pressure transducer with two-wavelength passive quadrature readout. , 1998, Applied optics.

[11]  W J Bock,et al.  Temperature-hydrostatic pressure cross-sensitivity effect in elliptical-core, highly birefringent fibers. , 1996, Applied optics.

[12]  W J Bock,et al.  Cross-sensitivity effect in temperature-compensated sensors based on highly birefringent fibers. , 1994, Applied optics.

[13]  T G Giallorenzi,et al.  Optical techniques to solve the signal fading problem in fiber interferometers. , 1982, Applied optics.