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Proceedings Paper

Photonic crystal fiber based modal interferometer for refractive index sensing
Author(s): Ming Deng; Xiaokang Sun; Wei Huang; Huifeng Wei; Jiang Li
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Paper Abstract

A core-cladding-mode interferometer (CCMI) is fabricated by splicing a single-mode fiber (SMF) to an endlessly singlemode photonic crystal fiber (ESM-PCF). The optimum collapsed length of ESM-PCF is investigated to ensure a higherorder cladding mode of ESM-PCF to be excited, serving as a sensing beam. At the end of ESM-PCF, a spherical endfacet with big radius is proposed to ensure from where the higher-order cladding mode to be reflected and then it interferes with the core mode serving as a reference beam. Such a device has an enhanced refractive index sensitivity of ~199 nm/RIU, offering potentials in biological and chemical applications.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915785 (2 June 2014); doi: 10.1117/12.2059445
Show Author Affiliations
Ming Deng, Chongqing Univ. (China)
Xiaokang Sun, Chongqing Univ. (China)
Wei Huang, Chongqing Univ. (China)
Huifeng Wei, Yangtze Optical Fibre and Cable Co., Ltd. (China)
Jiang Li, Yangtze Optical Fibre and Cable Co., Ltd. (China)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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