Recent developements in fiberoptic IR-sensors

Uwe Bindig, Martina Meinke, Ingo Gersonde, Odded Spector, Abraham Katzir, Gerhard Müller

Research output: Contribution to journalArticlepeer-review

Abstract

Although there is an ongoing effort to use infrared-spectroscopy for tissue differentiation and classification, there is still a need for the development of a sensor for use in the quick and non-destructive detection of spectral changes resulting from, for example, the influence of temperature. It is our intention to investigate flat IR-sensors and their suitability as a tool for detection within bio-organic compounds. Initial investigations using bio-liquids, tissues in the native and coagulated state, and micro-organisms have already been carried out. According to the literature, major IR-spectroscopic differences can be expected in the 'fingerprint' region (1500 - 1000 cm-1). An experimental set up was based on an FTIR-spectrometer, fiber optic cables, sensor and an external detector. A sensor was used whereby a segment of 1.5 cm at the center of the fiber was flattened to approx. 150 μm. Transmission spectra of flattened fibers have been compared to those of the cylindrical fibers. Spectral differences were obtained indicating a possible use for the study of thermal damage in tissues. The fiber-optic based results are comparable to micro-ATR-FTIR-spectroscopy (attenuated total reflectance) measurements. IR-sensing was performed either using circular or fiat silver halide wave guide.

Original languageEnglish
Pages (from-to)40-48
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4158
DOIs
StatePublished - 2001

Keywords

  • Bio-fluid
  • Bio-gel
  • IR fiber-optic
  • IR-sensor
  • IR-spectrometry
  • Silver halide wave guide
  • Tissue

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