Multipass Capillary Cell for Enhanced Raman Measurements of Gases
Applied Spectroscopy, Vol. 62, Issue 3, pp. 285-289 (2008)
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Abstract
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.
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Citation
William F. Pearman, J. Chance Carter, S. Michael Angel, and James Wai-Jeung Chan, "Multipass Capillary Cell for Enhanced Raman Measurements of Gases," Appl. Spectrosc. 62, 285-289 (2008)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-62-3-285
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