Toward precision measurements of methane with interband cascade lasers

Chris Hovde; Daniel B. Oh; Mark A. Zondlo; Chul Soo Kim; Mijin Kim; William Bewley; Chadwick L. Canedy; Igor Vurgaftman; Jerry R. Meyer

doi:10.1117/12.734215

5 October 2007 Toward precision measurements of methane with interband cascade lasers

Chris Hovde, Daniel B. Oh, Mark A. Zondlo, Chul Soo Kim, Mijin Kim, William Bewley, Chadwick L. Canedy, Igor Vurgaftman, Jerry R. Meyer

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Proceedings Volume 6756, Chemical and Biological Sensors for Industrial and Environmental Monitoring III; 67560B (2007) https://doi.org/10.1117/12.734215
Event: Optics East, 2007, Boston, MA, United States

Abstract

Measurement of the isotopic composition of atmospheric methane is a valuable tool for understanding the sources and sinks of the global carbon budget. One promising carbon isotope ratio measurement technology is optical spectroscopy using inter-band cascade (IC) lasers. Ongoing development of these light sources has the goal of providing, from a package operating near room temperature, a single mode laser source in the wavelength range of 3 &mgr;m. The spectral features of methane are sufficiently strong at this wavelength that a path length of about 100 m should suffice for measuring 12- and 13-C isotopes in air without pre-concentrating the sample. Experimental IC lasers are described and their use for isotope sensing by wavelength modulation spectroscopy is evaluated.

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Chris Hovde, Daniel B. Oh, Mark A. Zondlo, Chul Soo Kim, Mijin Kim, William Bewley, Chadwick L. Canedy, Igor Vurgaftman, and Jerry R. Meyer "Toward precision measurements of methane with interband cascade lasers", Proc. SPIE 6756, Chemical and Biological Sensors for Industrial and Environmental Monitoring III, 67560B (5 October 2007); https://doi.org/10.1117/12.734215

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