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  • Vol. 36, Iss. 20 — Oct. 15, 2011
  • pp: 4044–4046

Ultra-high-resolution large-dynamic-range optical fiber static strain sensor using Pound–Drever–Hall technique

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


Optics Letters, Vol. 36, Issue 20, pp. 4044-4046 (2011)
http://dx.doi.org/10.1364/OL.36.004044


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Abstract

We report the realization of a fiber-optic static strain sensor with ultrahigh resolution and large dynamic range for the applications of geophysical research. The sensor consists of a pair of fiber-Bragg-grating-based Fabry–Perot interferometers as sensor heads for strain sensing and reference, respectively. The Pound–Drever–Hall technique is employed to interrogate the sensor heads, and a cross-correlation algorithm is used to figure out the strain information with high precision. Static strain resolution down to 5.8 nanostrains is demonstrated. The dynamic range can be extended up to hundreds of microstrains, and the measuring period is a few tens of seconds.

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.5060) Instrumentation, measurement, and metrology : Phase modulation

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: July 26, 2011
Revised Manuscript: September 16, 2011
Manuscript Accepted: September 20, 2011
Published: October 12, 2011

Citation
Qingwen Liu, Tomochika Tokunaga, and Zuyuan He, "Ultra-high-resolution large-dynamic-range optical fiber static strain sensor using Pound–Drever–Hall technique," Opt. Lett. 36, 4044-4046 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-20-4044


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