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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 29, Iss. 19 — Oct. 1, 2011
  • pp: 2985–2991

Asymmetrical Twin-Core Fiber Based Michelson Interferometer for Refractive Index Sensing

Ai Zhou, Guangping Li, Yanhui Zhang, Yuzhuo Wang, Chunying Guan, Jun Yang, and Libo Yuan

Journal of Lightwave Technology, Vol. 29, Issue 19, pp. 2985-2991 (2011)


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Abstract

An asymmetrical twin-core fiber based Michelson interferometer is reported as a refractive index sensor. One core of the twin-core fiber locates at the fiber center and the other core is 26 μm away from the central core. Part of the cladding of the twin-core fiber over a small length is removed by chemical etching to make the effective refractive index of the fundamental mode of the side core is sensitive to the ambient refractive index. Therefore, the interference spectrum between the central core and the side core shifts with the variation of the ambient refractive index. The sensitivity of such a Michelson interferometer is ~270 nm/RIU in the range of 1.34–1.38.

© 2011 IEEE

Citation
Ai Zhou, Guangping Li, Yanhui Zhang, Yuzhuo Wang, Chunying Guan, Jun Yang, and Libo Yuan, "Asymmetrical Twin-Core Fiber Based Michelson Interferometer for Refractive Index Sensing," J. Lightwave Technol. 29, 2985-2991 (2011)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-29-19-2985

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