Fundamental noise sources in a high-sensitivity two-tone frequency modulation spectrometer and detection of CO2 at 1.6 μm and 2 μm |
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| Authors: | G. Modugno C. Corsi M. Gabrysch F. Marin M. Inguscio |
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| Affiliation: | INFM - Sezione di Firenze and European Laboratory for Nonlinear Spectroscopy (LENS), Largo?E.?Fermi?2, 50125 Firenze, Italy, IT
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| Abstract: | 2 , and its sensitivity is 7(2)×10-8 in a 1-Hz bandwidth. The corresponding minimum detectable concentration of CO2 in air has been estimated to be 1 ppm · m. This opens the possibility of a detection at ppb levels at 2 μm, where a two orders
of magnitude increase in the CO2 absorption signal is demonstrated.
Received: 06 April 1998/Revised version: 02 July 1998 |
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| Keywords: | PACS: 42.62.Fi 42.55.Px 39.30.+w |
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