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Issue 6, 2003
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Fibre optic coupler as a detector for microfluidic applications

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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.

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Publication details

The article was received on 03 Jan 2003, accepted on 23 Apr 2003 and first published on 07 May 2003

Article type: Paper
DOI: 10.1039/B300068K
Analyst, 2003,128, 523-526

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    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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