Distributed acoustic mapping based on interferometry of phase optical time-domain reflectometry

Abstract We demonstrate the design and characterization of a distributed optical fiber sensing system based on Michelson interferometer of the phase sensitive optical time domain reflectometer (φ-OTDR) for acoustic measurement. Phase, amplitude, frequency response and location information can be directly obtained at the same time by using the passive 3×3 coupler demodulation. In order to simulate sound profiles of seismic or hydroacoustic imaging, experiments on detection of multiple piezoelectric transducers (PZT) are carried out. The result shows that our system can well demodulate different acoustic sources with different intensities.

[1]  J. P. Dakin,et al.  Real-time location of multiple time-varying strain disturbances, acting over a 40-km fiber section, using a novel dual-Sagnac interferometer , 2001 .

[2]  Deming Liu,et al.  Distributed fiber-optic vibration sensor using a ring Mach-Zehnder interferometer , 2008 .

[3]  Kun Xu,et al.  An intrusion detection sensor based on coherent optical time domain reflector , 2010 .

[4]  Juan C Juarez,et al.  Field test of a distributed fiber-optic intrusion sensor system for long perimeters. , 2007, Applied optics.

[5]  M. Kondrat,et al.  A Sagnac-Michelson fibre optic interferometer: Signal processing for disturbance localization , 2007 .

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

[7]  Xiaoyi Bao,et al.  Time-division multiplexing-based BOTDA over 100 km sensing length. , 2011, Optics letters.

[8]  X. Bao,et al.  Distributed optical fiber vibration sensor based on spectrum analysis of Polarization-OTDR system. , 2008, Optics express.

[9]  J. Juarez,et al.  Distributed fiber-optic intrusion sensor system , 2005, Journal of Lightwave Technology.

[10]  Marcelo A. Soto,et al.  Analysis of distributed temperature sensing based on Raman scattering using OTDR coding and discrete Raman amplification , 2007 .

[11]  Xiaojun Fang,et al.  A variable-loop Sagnac interferometer for distributed impact sensing , 1996 .

[12]  Xiaoyi Bao,et al.  Modulated pulses based distributed vibration sensing with high frequency response and spatial resolution. , 2013, Optics express.

[13]  Chao Zuo,et al.  Dual Michelson interferometers for distributed vibration detection. , 2011, Applied optics.

[14]  Michael G. Tanner,et al.  High-resolution single-mode fiber-optic distributed Raman sensor for absolute temperature measurement using superconducting nanowire single-photon detectorsa) , 2011 .

[15]  Beatrys M. Lacquet,et al.  Modified sagnac/mach–zehnder interferometer for distributed disturbance sensing , 1999 .

[16]  Pieter L. Swart,et al.  Merged Sagnac-Michelson interferometer for distributed disturbance detection , 1997 .

[17]  Michael D. Todd,et al.  Improved, operationally-passive interferometric demodulation method using 3/spl times/3 coupler , 2002 .

[18]  Xiaoyi Bao,et al.  Distributed Vibration Sensor Based on Coherent Detection of Phase-OTDR , 2010, Journal of Lightwave Technology.

[19]  Y. Koyamada,et al.  Fiber-Optic Distributed Strain and Temperature Sensing With Very High Measurand Resolution Over Long Range Using Coherent OTDR , 2009, Journal of Lightwave Technology.

[20]  Yongkang Dong,et al.  2 cm spatial-resolution and 2 km range Brillouin optical fiber sensor using a transient differential pulse pair. , 2012, Applied optics.

[21]  S. E. Watkins,et al.  Smart bridges with fiber-optic sensors , 2003 .

[22]  Juan C Juarez,et al.  Polarization discrimination in a phase-sensitive optical time-domain reflectometer intrusion-sensor system. , 2005, Optics letters.

[23]  X Fang,et al.  Fiber-optic distributed sensing by a two-loop Sagnac interferometer. , 1996, Optics letters.