A compact fibre-based fluorescence sensor

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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Pages (from-to)84-89
Number of pages6
JournalSensors and Actuators, A: Physical
Volume119
Issue number1
DOIs
Publication statusPublished - 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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