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Proceedings Paper

Picoliter-volume glucose concentration microsensor based on miniature abrupt-tapered Mach-Zehnder-interferometer
Author(s): Zhi-Zheng Feng; Tsung-Hsun Yang; Nan-Kuang Chen; Yi-Ning Chen; Yu-Chung Chang
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Paper Abstract

We report an ultracompact Mach-Zehnder index sensor with a device length of 438.6 μm using two micro-abrupt-tapers in a cladding-reduced strongly-guiding fiber based on a focused CO2 laser beam. The cladding of strongly-guiding fiber is chemically etched before irradiated by a focused CO2 laser beam. The index sensitivity is 600 nm/refractive index unit respectively at around 1.37 μm wavelength with a volume of 31.2 picoliter optical liquid trapping at one micro-abrupt-taper. A 72 picoliter glucose liquid with concentration of 200 mg/dL can lead to a red-shift of 0.8 nm at 1.3 μm.

Paper Details

Date Published: 30 January 2012
PDF: 6 pages
Proc. SPIE 8218, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII, 821807 (30 January 2012); doi: 10.1117/12.904699
Show Author Affiliations
Zhi-Zheng Feng, National United Univ. (Taiwan)
Tsung-Hsun Yang, National United Univ. (Taiwan)
Nan-Kuang Chen, National United Univ. (Taiwan)
Yi-Ning Chen, National United Univ. (Taiwan)
Yu-Chung Chang, National Changhua Univ. of Education (Taiwan)


Published in SPIE Proceedings Vol. 8218:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII
Israel Gannot, Editor(s)

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