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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 20214–20223

Realization of nano static strain sensing with fiber Bragg gratings interrogated by narrow linewidth tunable lasers

Qingwen Liu, Tomochika Tokunaga, and Zuyuan He  »View Author Affiliations

Optics Express, Vol. 19, Issue 21, pp. 20214-20223 (2011)

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Aiming at realizing a static strain sensor of nano-strain resolution, which is required in most geophysical applications, this paper presents a thorough analysis on the strain resolution of a fiber Bragg grating (FBG) static strain sensor interrogated with a narrow linewidth tunable laser. The main noise sources of the sensor are discussed, and the strain resolution is deduced with a cross-correlation algorithm. The theoretical prediction agrees well with our experimental result, and the analysis is further validated by numerical simulations. Based on the analysis, the paper provides the guidelines for optimizing this type of sensor to realize ultra-high resolution. It is shown that with properly designed FBGs and interrogation systems, nano static strain resolution can be realized, as we recently demonstrated in experiment.

© 2011 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:

Original Manuscript: July 12, 2011
Revised Manuscript: September 24, 2011
Manuscript Accepted: September 25, 2011
Published: September 30, 2011

Qingwen Liu, Tomochika Tokunaga, and Zuyuan He, "Realization of nano static strain sensing with fiber Bragg gratings interrogated by narrow linewidth tunable lasers," Opt. Express 19, 20214-20223 (2011)

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