An apparatus for recording broadband infrared absorption spectra from 2.2 to 2.7 microm with subpicosecond time resolution is described. It comprises a new subpicosecond IR continuum generator, based on stimulated electronic Raman scattering in Ba vapor, and a broadband, infrared-to-visible upconverter, utilizing alkali metal vapor.
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Glownia et al. (1987) studied this question.
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