Multipass capillary cell for enhanced Raman measurements of gases

William F. Pearman, J. Chance Carter, S. Michael Angel, James W Chan

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


A simple Raman multipass capillary cell (MCC) is described that gives 12-to 30-fold signal enhancements for non-absorbing gases. The cell is made by coating the inside of 2-mm inner diameter silica capillary tubes with silver. The device is very small and suitable for remote and in situ Raman measurements with optical fibers. Application of the MCC is similar to previously described liquid core waveguides but, unlike the latter devices, the MCC is generally more applicable to a wide range of non-absorbing gases.

Original languageEnglish (US)
Pages (from-to)285-289
Number of pages5
JournalApplied Spectroscopy
Issue number3
StatePublished - Mar 2008
Externally publishedYes


  • Capillary cell
  • Gas analysis
  • Raman multipass cell
  • Silver-coated glass capillary

ASJC Scopus subject areas

  • Spectroscopy
  • Instrumentation


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