Abstract
Recent advances in electro-optic material technology make it possible to generate coherent, widely tunable, continuous-wave (cw) infrared radiation by means of difference-frequency generation (DFG) based on materials such as AgGaS2 and AgGaSe2. Covering the spectral region from 3 to 18 μm, which contains a rich fraction of the primary-fingerprint infrared, this source represents a very valuable tool for highresolution, high-sensitivity infrared absorption spectroscopy.
© 1993 Optical Society of America
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