Cavity ringdown spectroscopy using mid-infrared quantum-cascade lasers.
نویسندگان
چکیده
Cavity ringdown spectra of ammonia at 10 parts in 10(9) by volume (ppbv) and higher concentrations were recorded by use of a 16-mW continuous-wave quantum-casacde distributed-feedback laser at 8.5 mum whose wavelength was continuously temperature tuned over 15 nm. A sensitivity (noise-equivalent absorbance) of 3.4x10(-9) cm(-1) Hz(-1/2) was achieved for ammonia in nitrogen at standard temperature and pressure, which corresponds to a detection limit of 0.25 ppbv.
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ورودعنوان ژورنال:
- Optics letters
دوره 25 9 شماره
صفحات -
تاریخ انتشار 2000