A compact fibre-based fluorescence sensor

Mohammad Ahmad; Kuang Po Chang; Terence A. King; Larry L. Hench

doi:10.1016/j.sna.2004.09.007

A compact fibre-based fluorescence sensor

Mohammad Ahmad, Kuang Po Chang, Terence A. King, Larry L. Hench

Centre for Preparatory studies

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

A compact sensor consisting of two positive guiding fibres and one negative non-guiding fibre has been developed with large sensitivity for detection of fluorescence emitted from a laser dye. The positive fibre is used to deliver laser light to the negative fibre. The negative fibre acts as a sensing element, the pump light leaks into its surrounding which excites the laser dye molecules embedded in an index matched liquid coated onto the core of the negative fibre. The fluorescence is guided by another positive fibre attached to the distal end of the negative fibre and detected by a CCD camera. The response of the sensor with various fibre diameters and sensing lengths as a function of laser dye concentration has been determined. The sensor is capable of measuring 50 pg/ml of laser dye (rhodamine 6G).

Original language	English
Pages (from-to)	84-89
Number of pages	6
Journal	Sensors and Actuators, A: Physical
Volume	119
Issue number	1
DOIs	https://doi.org/10.1016/j.sna.2004.09.007
Publication status	Published - Mar 28 2005

Keywords

Biological and chemical agents
Fibres
Fluorescence sensors
Laser dye
Lasers
Leaky fibre and cells

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering

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abstract = "A compact sensor consisting of two positive guiding fibres and one negative non-guiding fibre has been developed with large sensitivity for detection of fluorescence emitted from a laser dye. The positive fibre is used to deliver laser light to the negative fibre. The negative fibre acts as a sensing element, the pump light leaks into its surrounding which excites the laser dye molecules embedded in an index matched liquid coated onto the core of the negative fibre. The fluorescence is guided by another positive fibre attached to the distal end of the negative fibre and detected by a CCD camera. The response of the sensor with various fibre diameters and sensing lengths as a function of laser dye concentration has been determined. The sensor is capable of measuring 50 pg/ml of laser dye (rhodamine 6G).",

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