Analysis of distributed optical fibre acoustic sensors through numerical modelling.

A distributed optical fibre acoustic sensor is numerically modelled. To increase the flexibility of the model, the building blocks of the sensing system are modelled separately and later combined to form the numerical model. This approach is adopted to facilitate the evaluation of each of the individual building blocks and their effects on the output of the sensor. The numerical model is used to assess the effect of parameters such as the linewidth of the laser source, the width of the probe pulse, and the frequency and amplitude of perturbation on the response of the sensing system. It is shown that the precision and accuracy of the sensing system are affected by the frequency and amplitude of perturbation as well as the pulse width and linewidth of the probe pulse.

[1]  Katerina Krebber,et al.  Relative change measurement of physical quantities using dual-wavelength coherent OTDR. , 2017, Optics express.

[2]  Fan Zhu,et al.  The Development of an $\Phi $ -OTDR System for Quantitative Vibration Measurement , 2015, IEEE Photonics Technology Letters.

[3]  High spatial resolution distributed optical fibre dynamic strain sensor with enhanced frequency and strain resolution , 2016 .

[4]  Trevor P. Newson,et al.  A distributed optical fibre dynamic strain sensor based on phase-OTDR , 2013 .

[5]  Kentaro Nakamura,et al.  Ultrahigh-speed distributed Brillouin reflectometry , 2016, Light: Science & Applications.

[6]  Gang-Ding Peng,et al.  Distributed acoustic mapping based on interferometry of phase optical time-domain reflectometry , 2015 .

[7]  J. Pastor-Graells,et al.  Single-shot distributed temperature and strain tracking using direct detection phase-sensitive OTDR with chirped pulses. , 2016, Optics express.

[8]  Peter Healey,et al.  Statistics of Rayleigh Backscatter From a Single-Mode Fiber , 1987, IEEE Trans. Commun..

[9]  Tao Zhu,et al.  Effect of laser linewidth on phase-OTDR based distributed vibration sensing regime , 2014, Other Conferences.

[10]  Shengwen Feng,et al.  Phase-Sensitive Optical Time Domain Reflectometer Based on Phase-Generated Carrier Algorithm , 2015, Journal of Lightwave Technology.

[11]  Haniel Gabai,et al.  Optical frequency domain reflectometry at maximum update rate using I/Q detection. , 2015, Optics letters.

[12]  Ali Masoudi,et al.  Distributed dynamic large strain optical fiber sensor based on the detection of spontaneous Brillouin scattering. , 2013, Optics letters.

[13]  T. Newson,et al.  Contributed Review: Distributed optical fibre dynamic strain sensing. , 2016, The Review of scientific instruments.

[14]  M. Tur,et al.  Slope-assisted fast distributed sensing in optical fibers with arbitrary Brillouin profile. , 2011, Optics express.

[15]  Y. Rao,et al.  Coherent Φ-OTDR based on I/Q demodulation and homodyne detection. , 2016, Optics express.

[16]  Xiaoping Zheng,et al.  Multi-event waveform-retrieved distributed optical fiber acoustic sensor using dual-pulse heterodyne phase-sensitive OTDR. , 2017, Optics letters.

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

[18]  Trevor P. Newson,et al.  Distributed optical fibre audible frequency sensor , 2014, Other Conferences.

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

[20]  R. Posey,et al.  Rayleigh scattering optical frequency correlation in a single-mode optical fiber. , 2001, Optics letters.

[21]  G. Hocker,et al.  Fiber optics strain gauge. , 1978, Applied optics.

[22]  V. S. Vdovenko,et al.  A phase-sensitive optical time-domain reflectometer with dual-pulse phase modulated probe signal , 2014 .

[23]  Zuyuan He,et al.  Long-Range Distributed Vibration Sensing Based on Phase Extraction From Phase-Sensitive OTDR , 2016, IEEE Photonics Journal.

[24]  Ander Zornoza,et al.  Dynamic BOTDA measurements based on Brillouin phase-shift and RF demodulation. , 2012, Optics express.