Sage Journals: Discover world-class research

Abstract

Brillouin scattering based sensors can measure strain and/or temperature at all points along an optical fiber; first, the fiber must be calibrated. A problem arises because the temperature coefficient of a fiber bonded to a host is changed by the host structure. Using the loose fiber coefficient could lead to large strain and temperature measurement errors. This article studies the change in the Brillouin temperature coefficient due to bonding. The intrinsic Brillouin temperature coefficient of two fibers is also found. This coefficient allows accurate strain and temperature measurements to be made, assuming the coefficient of thermal expansion of the host is known.

Keywords

BOTDA strain temperature coefficient of thermal expansion temperature coefficient.

Get full access to this article

View all access options for this article.

References

Agrawal, G.P. 2001. Nonlinear Fiber Optics, 3rd edn, Academic Press, Boston.

Alahbabi, M.N. , Cho, Y.T. and Newson, T.P. 2004. `` Simultaneous Distributed Measurements of Temperature and Strain Using Spontaneous Raman and Brillouin Scattering ,'' Second European Workshop on Optical Fiber Sensors, Proceedings of SPIE, 5502:488—491.

ASM Ready Reference: Thermal Properties of Materials, ASM International , downloaded August 27, 2004 from www.asminternational.org.

Bao, X. , Webb, D.J. and Jackson, D.A. 1994. `` Combined Distributed Temperature and Strain Sensor Based on Brillouin Loss in an Optical Fiber ,'' Optics Letters , 19(2):141—143.

Bao, X. , Huang, C. , Zeng, X. , Arcand, A. and Sullivan, P. 2002a. `` Simultaneous Strain and Temperature Monitoring of the Composite Cure with a Brillouin-scattering-based Distributed Sensor ,'' Optical Engineering, 41(7):1496—1501.

Bao, X. , Smith, J. and Brown, A.W. 2002b. `` Temperature and Strain Measurements Using the Power, Line-width, Shape, and Frequency Shift of the Brillouin Loss Spectrum ,'' In: Proc. of SPIE, Advanced Sensor Systems and Applications , 4920:311—322.

Brown, A.W. , Smith, J.P. , Bao, X. , DeMerchant, M.D. and Bremner, T.W. 1999. `` Brillouin Scattering based Distributed Sensors for Structural Applications ,'' Journal of Intelligent Material Systems and Structures, 10(4):340—349.

Brown, K. , Brown, A.W. and Colpitts, B.G. 2004. ``Optical Fiber Characterization for Optimization of a Brillouin Scattering based Fiber Optic Sensor,'' Photonic Applications in Telecommunications, Sensors, Software, and Lasers, Proc. of SPIE , 5579:226—234.

Canadian Portland Cement Association. 1984 . Engineering Bulletin: Design and Control of Concrete Mixtures , Canadian Metric Edn .

10.

Kurashima, T. , Horiguchi, T. and Tateda, M. 1990. `` Thermal Effects on the Brillouin Frequency Shift in Jacketed Optical Silica Fibers ,'' Applied Optics, 29(15):2219—2222.

11.

Lee, C.C. , Chiang, P.W. and Chi, S. 2001. `` Utilization of a Dispersion Shifted Fiber for Simultaneous Measurement of Distributed Strain and Temperature through Brillouin Frequency Shift ,'' IEEE Photonics Technology Letters, 13(10):1094—1096.

12.

Murayama, H. , Kageyama, K. , Naruse, H. , Simada, A. and Uzawa, K. 2003. `` Application of Fiber-optic Distributed Sensors to Health Monitoring for Full-scale Composite Structures ,'' Journal of Intelligent Material Systems and Structures, 14(1):3—13.

13.

Zeng, X. , Yu, Q. , Ferrier, G. and Bao, X. 2002. `` Strain and Temperature Monitoring of a Concrete Structure Using a Distributed Brillouin Scattering Sensor ,'' In: Proceedings of the First International Workshop on Structural Health Monitoring of Innovative Civil Engineering Structures, ISIS Canada Corporation, 207—216.

14.

Zou, L. , Bao, X. , Sharaam Afshar, V. and Chen, L. 2004. `` Dependence of the Brillouin Frequency Shift on Strain and Temperature in a Photonic Crystal Fiber ,'' Optics Letters , 29(13):1485—1487.

Analysis of Brillouin Scattering Based Fiber Optic Sensor Bonding Effects

Abstract

Keywords

Get full access to this article

References