期刊
OPTICS EXPRESS
卷 23, 期 5, 页码 5491-5499出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.005491
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- USA CMD-APG - Edgewood Chem Bio Center [W911SR-12-C-0041]
We report the initial evaluation of a mid-infrared QCL-coupled silicon-on-sapphire ring resonator gas sensor. The device probes the N2O 2241.79 cm(-1) optical transition (R23 line) in the nu(3) vibrational band. N2O concentration is deduced using a non-linear least squares fit, based on coupled-mode theory, of the change in ring resonator Q due to gas absorption losses in the evanescent portion of the waveguide optical mode. These early experiments demonstrated response to 5000 ppmv N2O. (C) 2015 Optical Society of America
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