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Proceedings Paper

Ultrasensitive refractive index sensor based on elliptic microfibers fabricated by CO2 laser
Author(s): Li-Peng Sun; Jie Li; Long Jin; Bai-Ou Guan
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Paper Abstract

A highly-birefringent elliptic microfiber is fabricated by use of the CO2-laser machining and fusion tapering methods. The fiber ellipse can be well controlled with modification of the CO2 laser output power. Both positive and negative sensitivities are observed for the structure to be used in the refractive index sensing application, in contrast to the previously-reported microfiber devices. Moreover, the maximum obtained sensitivity is as high as 195348nm/RIU (refractive index unit) around refractive index of 1.35887, which is one order of magnitude higher than other microfiber counterparts. The temperature-cross sensitivity of 0.007nm/°C is quite low.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 915751 (2 June 2014); doi: 10.1117/12.2059474
Show Author Affiliations
Li-Peng Sun, Jinan Univ. (China)
Jie Li, Jinan Univ. (China)
Long Jin, Jinan Univ. (China)
Bai-Ou Guan, Jinan Univ. (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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