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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 16 — Aug. 11, 2014
  • pp: 19581–19588

Cascaded fiber-optic Fabry-Perot interferometers with Vernier effect for highly sensitive measurement of axial strain and magnetic field

Peng Zhang, Ming Tang, Feng Gao, Benpeng Zhu, Songnian Fu, Jun Ouyang, Perry Ping Shum, and Deming Liu  »View Author Affiliations


Optics Express, Vol. 22, Issue 16, pp. 19581-19588 (2014)
http://dx.doi.org/10.1364/OE.22.019581


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Abstract

We report a highly sensitive fiber-optic sensor based on two cascaded intrinsic fiber Fabry-Perot interferometers (IFFPIs). The cascaded IFFPIs have different free spectral ranges (FSRs) and are formed by a short section of hollow core photonic crystal fiber sandwiched by two single mode fibers. With the superposition of reflective spectrum with different FSRs, the Vernier effect will be generated in the proposed sensor and we found that the strain sensitivity of the proposed sensor can be improved from 1.6 pm/με for a single IFFPI sensor to 47.14 pm/με by employing the Vernier effect. The sensor embed with a metglas ribbon can be also used to measure the magnetic field according to the similar principle. The sensitivity of the magnetic field measurement is achieved to be 71.57 pm/Oe that is significantly larger than the 2.5 pm/Oe for a single IFFPI sensor.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(230.3810) Optical devices : Magneto-optic systems
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 28, 2014
Revised Manuscript: July 5, 2014
Manuscript Accepted: July 24, 2014
Published: August 6, 2014

Citation
Peng Zhang, Ming Tang, Feng Gao, Benpeng Zhu, Songnian Fu, Jun Ouyang, Perry Ping Shum, and Deming Liu, "Cascaded fiber-optic Fabry-Perot interferometers with Vernier effect for highly sensitive measurement of axial strain and magnetic field," Opt. Express 22, 19581-19588 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-16-19581


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References

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