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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 22, Iss. 2 — Feb. 1, 2004
  • pp: 494–

Position Determination of an Acoustic Burst Along a Sagnac Interferometer

Paul R. Hoffman and Mark G. Kuzyk

Journal of Lightwave Technology, Vol. 22, Issue 2, pp. 494- (2004)


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Abstract

We report on a method to measure the longitudinal position of an acoustic burst, or spark, using an all-fiber Sagnac Interferometer (SI). A focused pulsed ~10 ns laser is used to ionize air creating the spark. This ionization point is situated near a coil of test fiber connected to the SI but acoustically separated from the bulk of the SI. A fast Fourier transform (FFT) performed on the temporal signal of the SI shows a series of nulls from which the position of the acoustic signal is determined. Over an SI length of ~35 km, longitudinal positions are determined to within tens of meters,corresponding to a best run percent uncertainty of 0.07%.

© 2004 IEEE

Citation
Paul R. Hoffman and Mark G. Kuzyk, "Position Determination of an Acoustic Burst Along a Sagnac Interferometer," J. Lightwave Technol. 22, 494- (2004)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-22-2-494

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