Sensing nitrous oxide with QCL-coupled silicon-on-sapphire ring resonators.
نویسندگان
چکیده
We report the initial evaluation of a mid-infrared QCL-coupled silicon-on-sapphire ring resonator gas sensor. The device probes the N(2)O 2241.79 cm(-1) optical transition (R23 line) in the ν(3) vibrational band. N(2)O 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 N(2)O.
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ورودعنوان ژورنال:
- Optics express
دوره 23 5 شماره
صفحات -
تاریخ انتشار 2015