Microfluidic refractive index sensor based on an all-silica in-line Fabry-Perot interferometer fabricated with microstructured fibers

Jiajun Tian, Yujie Lu, Qi Zhang, Ming Han

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

We report a microfluidic fiber-optic refractive index (RI) sensor based on an in-line Fabry-Perot (FP) interferometer, which is formed by a silica tube sandwiched by two microstructured fibers (MFs). The sensor reported here can be fabricated at low cost, possess a robust structure, and has microfluidic capability. The micro-sized holes in the MFs naturally function as microfluidic channels through which liquid samples can be efficiently and conveniently delivered into and out of the FP cavity by a pressure/vacuum pump system for high-performance RI measurement. Due to the microfluidic capability enabled by the MFs, only sub microliter sample is required. We also experimentally study and demonstrate the superior performances of the sensor in terms of high RI sensitivity, good measurement repeatability, and low temperature cross-sensitivity.

Original languageEnglish (US)
Pages (from-to)6633-6639
Number of pages7
JournalOptics Express
Volume21
Issue number5
DOIs
StatePublished - Mar 11 2013

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Fabry-Perot interferometers
refractivity
silicon dioxide
fibers
sensors
vacuum pumps
fiber optics
tubes
cavities
sensitivity
liquids

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Microfluidic refractive index sensor based on an all-silica in-line Fabry-Perot interferometer fabricated with microstructured fibers. / Tian, Jiajun; Lu, Yujie; Zhang, Qi; Han, Ming.

In: Optics Express, Vol. 21, No. 5, 11.03.2013, p. 6633-6639.

Research output: Contribution to journalArticle

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