A Fourier-spectrometer with a 30-m base-length multipass cell for the study of weak absorption spectra of atmospheric gases

2011 ◽  
Vol 24 (6) ◽  
pp. 593-595 ◽  
Author(s):  
Yu. N. Ponomarev ◽  
T. M. Petrova ◽  
A. M. Solodov ◽  
A. A. Solodov ◽  
S. A. Sulakshin
Keyword(s):  
Absorption Spectra ◽  
Fourier Spectrometer ◽  
Multipass Cell ◽  
Base Length ◽  
Atmospheric Gases ◽  
Weak Absorption

scholarly journals Rotatory dispersion in the amine series III-The absorption spectra of diamines

1937 ◽  
Vol 162 (909) ◽  
pp. 228-232 ◽  
Keyword(s):  
Nitrogen Atom ◽  
Absorption Band ◽  
Absorption Spectra ◽  
Amino Nitrogen ◽  
Lone Pair ◽  
Optically Active ◽  
Ethylene Diamine ◽  
Weak Absorption ◽  
Weak Absorption Band ◽  
Striking Effect

In view of the striking effect on the rotatory powers of optically active amines which occur when the lone-pair of electrons on the amino-nitrogen atom is saturated, as described in the two preceding papers, it was of importance to investigate the corresponding changes which are indicated in the absorption spectra the corresponding changes which are indicated in the absorption spectra of simple amino compounds. Absorption spectra are therefore now recorded for hydrazine and for ethylene-diamine, and the effect on these spectra of varying the acid concentration of the solutions has been measured. No previous measurements of the absorption of hydrazine in solution have been recorded, but sunao and Imanishi (1931) observed a series of bands between 2400 and 2200 A in the vapour. Ethylene-diamine has been examined by Bielecki and Henri (1913), and Castille and Ruppol (1928) have investigated its hydrochloride. The latter authors reported a weak absorption band in aqueous solutions of the salt (ϵ max = 0·4 at 2631 A), but this observation is not confirmed by the present results. It may be attributed to the presence of an impurity, since, in the first series band (ϵ max = 2 at 2631 A) was also seen, but after recrystallization of the salt it disappeared completely.

Laser Absorption Spectroscopy of H2O in the 12 252-12 312 cm-1Region Using Herriott-Type Cell

2014 ◽  
Vol 955-959 ◽  
pp. 1456-1461
Author(s):  
Gen Ping Lu ◽  
Wei Xin Shi ◽  
Ying Fa Wu ◽  
Chuan Liang Li ◽  
Xuan Bing Qiu ◽  
...  
Keyword(s):  
Water Vapor ◽  
Absorption Spectra ◽  
Absorption Spectroscopy ◽  
Optical Path ◽  
Laser Absorption Spectroscopy ◽  
Weak Absorption ◽  
Ti:Sapphire Laser ◽  
Laser Absorption ◽  
Centre Frequency ◽  
Voigt Profile

We study the absorption spectra of water vapor by the 899-29 Ti:sapphire laser in the region between 12 252-12 312 cm-1. Due to the weak absorption of H2O, a folded multi-pass optical path cell of Herriott-type is used to increase the sensitivity of detection. Totally, forty-three lines with intensity ranging around 10-24cm-1/molecule are recorded and the centre frequency of transitions is derived by fitting observed lines using Voigt profile.

Fast recording of weak absorption spectra in optical cavity using tunable laser

2013 ◽  
Vol 10 (11) ◽  
pp. 115701 ◽  
Author(s):  
I V Nikolaev ◽  
V N Ochkin ◽  
S N Tskhai
Keyword(s):  
Absorption Spectra ◽  
Optical Cavity ◽  
Tunable Laser ◽  
Weak Absorption
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