High sensitivity of taper-based Mach-Zehnder interferometer embedded in a thinned optical fiber for refractive index sensing

J. Yang; L. Jiang; S. Wang; B. Li; M. Wang; H. Xiao; Y. Lu; H. Tsai

doi:10.1364/AO.50.005503

High sensitivity of taper-based Mach-Zehnder interferometer embedded in a thinned optical fiber for refractive index sensing

J. Yang, L. Jiang, S. Wang, B. Li, M. Wang, H. Xiao, Y. Lu, H. Tsai

Electrical & Computer Engineering

Research output: Contribution to journal › Article › peer-review

91 Scopus citations

Abstract

A taper-based Mach-Zehnder interferometer (MZI) embedded in a thinned optical fiber is demonstrated as a highly sensitive refractive index (RI) sensor. A RI sensitivity of 2210:84nm=RIU (refractive index unit) is obtained at the external RI of 1.40, which is ten times higher than that of normal taper- and longperiod fiber grating (LPFG)-based sensors. The sensitivity can be further improved by decreasing the diameter of the thinned fiber and increasing the interferometer length of the MZI. The proposed MZIs have lower temperature sensitivities compared with normal fiber sensors, which is a desirable merit for RI sensors to reduce the cross sensitivity caused by thermal drift.

Original language	English (US)
Pages (from-to)	5503-5507
Number of pages	5
Journal	Applied optics
Volume	50
Issue number	28
DOIs	https://doi.org/10.1364/AO.50.005503
State	Published - Oct 1 2011

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

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abstract = "A taper-based Mach-Zehnder interferometer (MZI) embedded in a thinned optical fiber is demonstrated as a highly sensitive refractive index (RI) sensor. A RI sensitivity of 2210:84nm=RIU (refractive index unit) is obtained at the external RI of 1.40, which is ten times higher than that of normal taper- and longperiod fiber grating (LPFG)-based sensors. The sensitivity can be further improved by decreasing the diameter of the thinned fiber and increasing the interferometer length of the MZI. The proposed MZIs have lower temperature sensitivities compared with normal fiber sensors, which is a desirable merit for RI sensors to reduce the cross sensitivity caused by thermal drift.",

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AU - Yang, J.

AU - Jiang, L.

AU - Wang, S.

AU - Li, B.

AU - Wang, M.

AU - Xiao, H.

AU - Lu, Y.

AU - Tsai, H.

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High sensitivity of taper-based Mach-Zehnder interferometer embedded in a thinned optical fiber for refractive index sensing

Abstract

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