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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 3 — Feb. 11, 2013
  • pp: 2953–2963

Modulated pulses based distributed vibration sensing with high frequency response and spatial resolution

Tao Zhu, Qian He, Xianghui Xiao, and Xiaoyi Bao  »View Author Affiliations

Optics Express, Vol. 21, Issue 3, pp. 2953-2963 (2013)

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A distributed optical fiber sensing system merged Mach-Zehnder interferometer and phase sensitive optical time domain reflectometer (φ-OTDR) system for vibration measurement with high-frequency response and high spatial resolution is demonstrated, where modulated pulses are proposed to be used as sensing source. Frequency response and location information are obtained by Mach-Zehnder interferometer and φ-OTDR technology, respectively. In order to simulate high-frequency vibration of crack of cable and civil structure, experiments on detection of piezoelectric transducer and pencil-break are carried out. Spatial resolution of 5 m and the maximum frequency response of ~3 MHz are achieved in 1064 m fiber link when the narrow pulse width is 50 ns.

© 2013 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors

ToC Category:

Original Manuscript: November 2, 2012
Revised Manuscript: January 22, 2013
Manuscript Accepted: January 24, 2013
Published: January 31, 2013

Tao Zhu, Qian He, Xianghui Xiao, and Xiaoyi Bao, "Modulated pulses based distributed vibration sensing with high frequency response and spatial resolution," Opt. Express 21, 2953-2963 (2013)

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