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

Pasquale Maddaloni; Gianluca Gagliardi; Paolo Malara; Paolo De Natale

doi:10.1117/12.559550

15 September 2004 High-sensitivity and high-resolution trace gas detection by means of a mW-power DFG spectrometer around 3.2 μm

Pasquale Maddaloni, Gianluca Gagliardi, Paolo Malara, Paolo De Natale

Author Affiliations +

Proceedings Volume 5547, Remote Sensing in Atmospheric Pollution Monitoring and Control; (2004) https://doi.org/10.1117/12.559550
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Pasquale Maddaloni, Gianluca Gagliardi, Paolo Malara, and Paolo De Natale "High-sensitivity and high-resolution trace gas detection by means of a mW-power DFG spectrometer around 3.2 μm", Proc. SPIE 5547, Remote Sensing in Atmospheric Pollution Monitoring and Control, (15 September 2004); https://doi.org/10.1117/12.559550

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