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Proceedings Paper

High-sensitivity and high-resolution trace gas detection by means of a mW-power DFG spectrometer around 3.2 µm
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Paper Abstract

We report the realization of a mid-infrared tunable coherent radiation source based on difference-frequency generation with an output power that achieves, for the first time, a few mW. The signal and pump beams coming from two widely tunable, cw high power rare-earth-doped amplifiers are mixed into a periodically poled LiNbO3 crystal to produce radiation in the 2.9-3.5 μm spectral interval. The low intensity noise and the good spatial profile of the idler beam are first verified. The suitability of this new spectrometer for high-sensitivity and high-resolution gas detection is then demonstrated by performing saturated absorption spectroscopy of methane. Finally, the future development of a portable, multicomponent gas sensor for environmental monitoring is discussed.

Paper Details

Date Published: 15 September 2004
PDF: 6 pages
Proc. SPIE 5547, Remote Sensing in Atmospheric Pollution Monitoring and Control, (15 September 2004); doi: 10.1117/12.559550
Show Author Affiliations
Pasquale Maddaloni, Istituto Nazionale di Ottica Applicata (Italy)
Gianluca Gagliardi, Istituto Nazionale di Ottica Applicata (Italy)
Paolo Malara, Istituto Nazionale di Ottica Applicata (Italy)
Paolo De Natale, Istituto Nazionale di Ottica Applicata (Italy)


Published in SPIE Proceedings Vol. 5547:
Remote Sensing in Atmospheric Pollution Monitoring and Control
Allen Chu; James Szykman, Editor(s)

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