New possibilities of highly sensitive molecular absorption spectra in the visible region of the spectrum
V.I. Serdyukov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: light-diodes, Fourier spectroscopy, absorption
Abstract
This paper presents the emission spectra of the most powerful in the present LEDs in the visible range of the spectrum (by comparison with the emission spectrum of halogen lamp), which can be used as a transmitter in the Fourier transform spectrometer instead of halogen bulbs. It is concluded that it is possiblie to obtain registration sensitivity to 10–8 cm–1 for the absorption coefficient in the visible range when using LEDs. The registration of the absorption of water vapor in range 15400–16200 cm–1 showed the validity of the conclusions.
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