Significance of coherent Rayleigh noise in fibre-optic distributed temperature sensing based on spontaneous Brillouin scattering

The temperature resolution of a fibre-optic distributed temperature sensor based on taking the ratio of the temperature sensitive backscattered spontaneous Brillouin signal to the corresponding Rayleigh signal depends on the optical signal-to-noise of the receiver system and the amplitude fluctuations in the Rayleigh signal. The amplitude fluctuations or coherent Rayleigh noise have been investigated experimentally as a function of detection bandwidth, source bandwidth and spatial resolution and showed good agreement with theory.

[1]  Yahei Koyamada,et al.  Characteristics and reduction of coherent fading noise in Rayleigh backscattering measurement for optical fibers and components , 1992 .

[2]  A. Hartog,et al.  Spontaneous Brillouin-based distributed temperature sensor utilizing a fiber Bragg grating notch filter for the separation of the Brillouin signal , 2001, IEEE Photonics Technology Letters.

[3]  S. M. Maughan,et al.  Simultaneous distributed fibre temperature and strain sensor using microwave coherent detection of spontaneous Brillouin backscatter , 2001 .

[4]  M. P. Gold,et al.  Distributed temperature sensing in solid-core fibres , 1985 .

[5]  Nicol A. Heron,et al.  Experimental and theoretical studies on a distributed temperature sensor based on Brillouin scattering , 1995 .

[6]  H. Izumita,et al.  Fading noise reduction in coherent OTDR , 1992, IEEE Photonics Technology Letters.

[7]  K. Shimizu,et al.  Development of a distributed sensing technique using Brillouin scattering , 1995 .

[8]  P. Healey.  Fading rates in coherent OTDR , 1984 .

[9]  J. N. Ross,et al.  Distributed optical fibre Raman temperature sensor using a semiconductor light source and detector , 1985 .

[10]  T. Horiguchi,et al.  Distributed-temperature sensing using stimulated Brillouin scattering in optical silica fibers. , 1990, Optics letters.

[11]  S. Chi,et al.  Utilization of a dispersion-shifted fiber for simultaneous measurement of distributed strain and temperature through Brillouin frequency shift , 2001, IEEE Photonics Technology Letters.

[12]  T. Parker,et al.  A fully distributed simultaneous strain and temperature sensor using spontaneous Brillouin backscatter , 1997, IEEE Photonics Technology Letters.

[13]  X. Bao,et al.  Simultaneous distributed strain and temperature measurement. , 1999, Applied optics.

[14]  Diode-pumped Landau-Placzek based distributed temperature sensor utilising an all-fibre Mach-Zehnder interferometer , 1996 .

[15]  T. Newson,et al.  Double-pass configured fibre Mach-Zehnder interferometric optical filter for distributed fibre sensing , 1997 .

[16]  A. Hartog.  A distributed temperature sensor based on liquid-core optical fibers , 1983, Journal of Lightwave Technology.

[17]  Trevor P. Newson,et al.  Enhancing the measurement range of a Brillouin-based fiber optic distributed-temperature sensor by improving receiver sensitivity through optical preamplification , 2004, SPIE Optics East.

[18]  M Farhadiroushan,et al.  Temperature and strain dependence of the power level and frequency of spontaneous Brillouin scattering in optical fibers. , 1997, Optics letters.

[19]  T. Newson,et al.  Characterisation of strain dependence of the Landau-Placzek ratio for distributed sensing , 1997 .

[20]  L. Thévenaz,et al.  Simple distributed fiber sensor based on Brillouin gain spectrum analysis. , 1996, Optics letters.

[21]  T. Newson,et al.  50-km single-ended spontaneous-Brillouin-based distributed-temperature sensor exploiting pulsed Raman amplification. , 2003, Optics letters.

[22]  D. Garcus,et al.  Brillouin optical-fiber frequency-domain analysis for distributed temperature and strain measurements , 1997 .

[23]  E. C. Carr,et al.  Observation of coherent Rayleigh noise in single-source bidirectional optical fiber systems , 1988 .

[24]  H. Kee,et al.  All-fiber system for simultaneous interrogation of distributed strain and temperature sensing by spontaneous Brillouin scattering. , 2000, Optics letters.