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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 18 — Sep. 15, 2014
  • pp: 5267–5270

Hybrid structured fiber-optic Fabry–Perot interferometer for simultaneous measurement of strain and temperature

Ai Zhou, Boyang Qin, Zheng Zhu, Yaxun Zhang, Zhihai Liu, Jun Yang, and Libo Yuan  »View Author Affiliations


Optics Letters, Vol. 39, Issue 18, pp. 5267-5270 (2014)
http://dx.doi.org/10.1364/OL.39.005267


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Abstract

We fabricate and experimentally demonstrate a hybrid structured Fabry–Perot interferometer (FPI) embedded in the middle of a fiber line for simultaneous measurement of axial strain and temperature. The FPI is composed of a silica-cavity cascaded to a spheroidal air-cavity, both of which are formed in a hollow annular core fiber (HACF). The fabrication process of the FPI includes only a fusion splice between a single-mode fiber and a HACF and several electrical arc discharges at the HACF near the splice point. Experimental results show that the strain and temperature sensitivities of the air-cavity can be 5.2 pm/με and 1.3 pm/C°, respectively, and those of the silica-cavity can be 1.1 pm/με and 13 pm/C°, respectively. The different sensitivities of silica-cavity and air-cavity to strain and temperature enable us to implement simultaneous sensing in strain and temperature.

© 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

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: June 11, 2014
Revised Manuscript: July 13, 2014
Manuscript Accepted: July 27, 2014
Published: September 3, 2014

Citation
Ai Zhou, Boyang Qin, Zheng Zhu, Yaxun Zhang, Zhihai Liu, Jun Yang, and Libo Yuan, "Hybrid structured fiber-optic Fabry–Perot interferometer for simultaneous measurement of strain and temperature," Opt. Lett. 39, 5267-5270 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-18-5267

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