Issue 6, 2003

Fibre optic coupler as a detector for microfluidic applications

Abstract

A new construction of a fibre optic coupler is presented in the paper. Two polymer optical fibres were used to build a coupler in which coupling efficiency of optical power depends on the refractive index of liquid delivered to a microchannel formed by the fibres. The coupler was tested as a detector in saccharose concentration measurements, and was used in absorbance measurements. A red light emitting diode and a spectrometer were used as a light source and a photodetector, respectively. Experiments confirmed that the coupler can be used for the real time monitoring of the changes in the refractive index of a saccharose solution exhibiting repeatable changes in the signal, with no hysteresis. Absorbance tests were performed with a solution of bromothymol blue at different pH.

Article information

Article type
Paper
Submitted
03 Jan 2003
Accepted
23 Apr 2003
First published
07 May 2003

Analyst, 2003,128, 523-526

Fibre optic coupler as a detector for microfluidic applications

D. Stadnik and A. Dybko, Analyst, 2003, 128, 523 DOI: 10.1039/B300068K

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