Abstract
Extension of the tuning range of a pulsed dye laser to the mid infrared in a novel low-loss waveguide-type Raman cell is described. The guide has an adjustable cross section and length and is provided with a thin dielectric coating resulting in low propagation losses over a wide wavelength band. By employing high-pressure hydrogen as a Raman medium, quasi-continuous tuneability from 5.5 to 17 mu m was obtained from a single red dye.
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