Abstract
This work was done to develop a compact mid-infrared laser source for fast and sensitive detection of atmospheric trace gases. We report the application of all-diode-pumped room-temperature difference-frequency generation (DFG) to detection of the CO, N2O, and CO2 in ambient air near 4.6 μm. The DFG was performed in quasi-phase-matched periodically poled LiNbO31,2 This new material allows custom phase matching of commonly available high-power diode lasers, has high nonlinear coefficient, and wide acceptance bandwidth.3
© 1996 Optical Society of America
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