Time-domain coherent anti-Stokes Raman spectroscopy for hydrogen gas in the Dicke narrowing region

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:5122600

D'yakov, Y S; Krikunov, S A; Magnitskii, S A; Nikitin, S Y; Tunkin, V G

An experiment on time-domain coherent anti-Stokes Raman spectroscopy (time-domain CARS) of molecular hydrogen was performed in the pressure range 10/sup -2/--10 atm. The experimental setup had a dynamic measurement range 10/sup 5/ and could reliably record the signal in the gas-pressure range to 10/sup -2/ Torr. A theory of time-domain CARS is developed for an inhomogeneously broadened transition with allowance for two mechanisms that dephase the molecular vibrations, viz. collisions and the Doppler effect. The waveform of the pulsed response of a gaseous medium to an external field is calculated at arbitrary pressures. It is shown that under definite conditions the time-domain CARS technique can be used to determine the real and imaginary components of the nonlinear susceptibility of the medium, chi/sup( //sup 3/)/sup /(..omega..), in contrast to the frequency-domain CARS, in which Vertical Barchi/sup( //sup 3/)/sup /(..omega..)Vertical Bar/sup 2/ is measured. The results of the theory agree with the obtained experimental data.

• Research Organization: Moscow State University
• OSTI ID: 5122600
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 57:6; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ELEMENTS
HIGH VACUUM
HYDROGEN
LASER SPECTROSCOPY
LINE BROADENING
MEDIUM VACUUM
MOLECULES
NONMETALS
RAMAN SPECTROSCOPY
SPECTROSCOPY
WAVE FORMS