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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 21946–21952

Towards the control of highly sensitive Fabry-Pérot strain sensor based on hollow-core ring photonic crystal fiber

Marta S. Ferreira, Jörg Bierlich, Jens Kobelke, Kay Schuster, José L. Santos, and Orlando Frazão  »View Author Affiliations

Optics Express, Vol. 20, Issue 20, pp. 21946-21952 (2012)

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A high sensitivity Fabry-Pérot (FP) strain sensor based on hollow-core ring photonic crystal fiber was investigated. A low-finesse FP cavity was fabricated by splicing a section of hollow-core ring photonic crystal fiber between two standard single mode fibers. The geometry presents a low cross section area of silica enabling to achieve high strain sensitivity. Strain measurements were performed by considering the FP cavity length in a range of 1000 μm. The total length of the strain gauge at which strain was applied was also studied for a range of 900 mm. The FP cavity length variation highly influenced the strain sensitivity, and for a length of 13 μm a sensitivity of 15.4 pm/με was attained. Relatively to the strain gauge length, its dependence to strain sensitivity is low. Finally, the FP cavity presented residual temperature sensitivity (~0.81 pm/°C).

© 2012 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.2230) Instrumentation, measurement, and metrology : Fabry-Perot
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:

Original Manuscript: July 16, 2012
Revised Manuscript: August 22, 2012
Manuscript Accepted: August 23, 2012
Published: September 11, 2012

Marta S. Ferreira, Jörg Bierlich, Jens Kobelke, Kay Schuster, José L. Santos, and Orlando Frazão, "Towards the control of highly sensitive Fabry-Pérot strain sensor based on hollow-core ring photonic crystal fiber," Opt. Express 20, 21946-21952 (2012)

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