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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 22 — Nov. 15, 2012
  • pp: 4672–4674

Tuning operating point of extrinsic Fabry–Perot interferometric fiber-optic sensors using microstructured fiber and gas pressure

Jiajun Tian, Qi Zhang, Thomas Fink, Hong Li, Wei Peng, and Ming Han  »View Author Affiliations


Optics Letters, Vol. 37, Issue 22, pp. 4672-4674 (2012)
http://dx.doi.org/10.1364/OL.37.004672


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Abstract

Intensity-based demodulation of extrinsic Fabry–Perot interferometric (EFPI) fiber-optic sensors requires the light wavelength to be on the quadrature point of the interferometric fringes for maximum sensitivity. In this Letter, we propose a novel and remote operating-point tuning method for EFPI fiber-optic sensors using microstructured fibers (MFs) and gas pressure. We demonstrated the method using a diaphragm-based EFPI sensor with a microstructured lead-in fiber. The holes in the MF were used as gas channels to remotely control the gas pressure inside the Fabry–Perot cavity. Because of the deformation of the diaphragm with gas pressure, the cavity length and consequently the operating point can be remotely tuned for maximum sensitivity. The proposed operating-point tuning method has the advantage of reduced complexity and cost compared to previously reported methods.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: August 30, 2012
Manuscript Accepted: September 26, 2012
Published: November 8, 2012

Citation
Jiajun Tian, Qi Zhang, Thomas Fink, Hong Li, Wei Peng, and Ming Han, "Tuning operating point of extrinsic Fabry–Perot interferometric fiber-optic sensors using microstructured fiber and gas pressure," Opt. Lett. 37, 4672-4674 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-22-4672


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