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Combined raman and IR fiber-based sensor for gas detection

United States Patent

June 24, 2014
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A double-pass fiber-optic based spectroscopic gas sensor delivers Raman excitation light and infrared light to a hollow structure, such as a hollow fiber waveguide, that contains a gas sample of interest. A retro-reflector is placed at the end of this hollow structure to send the light back through the waveguide where the light is detected at the same end as the light source. This double pass retro reflector design increases the interaction path length of the light and the gas sample, and also reduces the form factor of the hollow structure.
Carter; Jerry C. (Livermore, CA), Chan; James W. (Elk Grove, CA), Trebes; James E. (Livermore, CA), Angel; Stanley M. (Columbia, SC), Mizaikoff; Boris (Ulm, DE)
Lawrence Livermore National Security, LLC (Livermore, CA), University of South Carolina (Columbia, SC), Georgia Tech Research Corporation (Atlanta, GA)
12/ 545,566
August 21, 2009
The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC.