Abstract

Two recent instrumental developments involving laser and Fourier transform spectroscopies, and their applications are discussed. The first one is of metrological relevance, and provides a stable frequency reference in the near-infrared region thanks to diode laser instrumentation. The second one combines intracavity laser absorption spectroscopy (ICLAS) and time-resolved Fourier transform spectroscopy (TRFTS). Spectra around 1 μm, exhibiting kilometric absorption path length, are obtained from the high-resolution time-resolved step-scan interferometer of the Laboratoire de Photophysique Moléculaire (LPPM), with an intracavity laser absorption set-up based on a vertical-external-cavity surface-emitting semiconductor laser (VECSEL).

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