Abstract
Abstract The efficiency of LED emitters in high resolution Fourier spectroscopy with a small multipass cell has been shown. Such aspects of Fourier spectroscopy as intensity of the light sources, their stability, and spectral range were considered. Using a 2.5 W LED emitter as a light source for the spectrometer with a 60-cm multipass cell during a 24-h measurement time and by optimizing a number of passes in the cell, we have achieved a signal-to-noise ratio of 1×10 5 which corresponds to a minimal detectable absorption coefficient of 6×10 −9 cm −1 . This made it possible to determine the parameters of water vapor lines with the intensity of 2×10 −28 cm/molecule. The absorption spectra of H 2 O and CO 2 isotopologues in the range of 10,000 to 23,000 cm −1 were recorded using high sensitivity Fourier spectrometer.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call