Multimode microfiber interferometer for dual-parameters sensing assisted by Fresnel reflection


A compact and low cost fiber sensor based on single multimode microfiber with Fresnel reflection is proposed and demonstrated for simultaneous measurement of refractive index and temperature. The sensor is fabricated with two simple steps including fiber tapering and then fiber endface cleaving. The reflection spectrum is an intensity modulated interference spectrum, as the tapered fiber generates interference pattern and the cleaved endface provides intensity modulation. By demodulating the fringe power and free spectrum range (FSR) of the spectrum, RI sensitivities of -72.247dB/RIU and 68.122nm/RIU, as well as temperature sensitivities of 0.0283dB/degrees C and -17pm/degrees C are obtained. Further, the sensing scheme could also provide the feasibility to construct a more compact sensing probe for dual-paramters measurement, which has great potential in bio/chemical detection.

Publication DOI:
Divisions: Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Uncontrolled Keywords: refractive-index sensor,Mach-Zehnder interferometer,photonic crystal fiber,optical microfiber,pressure sensor,temperature,silica,probe
Full Text Link: https://www.osa ... =oe-23-10-12777
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PURE Output Type: Article
Published Date: 2015-05-18
Published Online Date: 2015-05-07
Accepted Date: 2015-05-05
Submitted Date: 2015-02-11
Authors: Sun, Qizhen
Luo, Haipeng
Luo, Hongbo
Lai, Macheng
Liu, Deming
Zhang, Lin ( 0000-0002-1691-5577)

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