Abstract
Two continuous-wave single mode diode-lasers (Hitachi HL 7851G and Toshiba TOLD 9150) are applied as signal and pump sources for difference frequency generation (DFG) in an AgGaS2 crystal with a length of 30 mm. For 90° type I phase matching tunable mid-infrared laser radiation around 5 µm is obtained with an output power of up toP DFG = 0.2 µW while the diode lasers are operated with powers of 30 and 50 mW at the center wavelengths 682 and 791 nm, respectively. The performance of the diode-laser-DFG system is shown as the absorption spectrum of CO for the P(28) rotational line around 2023 cm−1 is probed in a 10cm long cell and in the exhaust of an engine.
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This research was supported by the Technologiestiftung Schleswig-Holstein under contract 94-35i.
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Schade, W., Blanke, T., Willer, U. et al. Compact tunable mid-infrared laser source by difference frequency generation of two diode-lasers. Appl. Phys. B 63, 99–102 (1996). https://doi.org/10.1007/BF01112844
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DOI: https://doi.org/10.1007/BF01112844