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Multi-wavelength raman imaging using a small-diameter image guide with a dimension-reduction imaging array.

J Chance Carter1, Wally A Scrivens, M L Myrick

  • 1Department of Chemistry and Biochemistry, University, of South Carolina, Columbia, South Carolina 29208, USA.

Applied Spectroscopy
|December 9, 2003
PubMed
Summary
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This study modified a fiber-optic Raman probe for high-resolution spectral imaging. The new technique enables in situ monitoring of polymer polymerization and temperature changes using Raman spectroscopy.

Area of Science:

  • Spectroscopy
  • Materials Science
  • Optical Engineering

Background:

  • Fiber-optic probes are crucial for remote and in situ chemical analysis.
  • High-resolution spectral Raman imaging requires advanced optical configurations.
  • Monitoring dynamic processes like polymerization benefits from real-time spectral data.

Purpose of the Study:

  • To modify a commercial fiber-optic Raman probe for high-resolution spectral Raman imaging.
  • To demonstrate the utility of this modified probe for in situ and remote monitoring.
  • To analyze polymer polymerization and temperature effects using Raman spectroscopy.

Main Methods:

  • A commercial fiber-optic Raman probe was adapted using a dimension-reduction imaging array (DRIA).
  • The DRIA coupled a 350 micrometer optical fiber image guide to a 672-fiber array (21x32 to 672x1).

Related Experiment Videos

  • An imaging spectrograph acquired multi-wavelength Raman images (-250 to 1800 cm(-1)) with ~5 cm(-1) resolution.

    • Main Results:

    • The modified probe achieved high-resolution spectral Raman imaging.
    • The technique successfully monitored dibromostyrene (DBS) polymerization in situ.
    • Raman Stokes/anti-Stokes ratios were measured as a function of heating time over a 4 x 1.6 mm area.

    Conclusions:

    • The modified fiber-optic Raman probe is effective for high-resolution spectral imaging.
    • This technique is suitable for in situ and remote monitoring of dynamic chemical processes.
    • The study demonstrates the capability for simultaneous spectral analysis and spatial mapping.