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Optical Engineering • Open Access

Single-mode fiber refractive index sensor with large lateral offset fusion splicing between two abrupt tapers
Author(s): Qi Zhang; Jun Zhou; Jinping Chen; Xiaoling Tan

Paper Abstract

We propose a novel refractive index (RI) sensor based on a fiber Mach-Zehnder interferometer formed by large lateral offset fusion splicing between two abrupt tapers. The cladding modes are efficiently excited by transmitted light in the large misalignment junctions. The RI sensitivity of the sensor to surrounding RI change is measured, and the sensitivity of 100 nm/RIU is obtained, which is three to six times higher than that of fiber structures with only a pair of tapers or two offset junctions. Moreover, the sensor is made by a low-cost fabrication method. Thus, the proposed structure is beneficial to the RI sensing applications.

Paper Details

Date Published: 12 September 2012
PDF: 3 pages
Opt. Eng. 51(9) 090502 doi: 10.1117/1.OE.51.9.090502
Published in: Optical Engineering Volume 51, Issue 9
Show Author Affiliations
Qi Zhang, Ningbo Univ. (China)
Jun Zhou, Ningbo Univ. (China)
Jinping Chen, Ningbo Univ. (China)
Xiaoling Tan, Ningbo Univ. (China)

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