High-resolution line-shape spectroscopy during a laser pulse based on Dual-Broad-Band-CARS interferometry
- A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
- German Aerospace Research Centre, DLR, Hardthausen (Germany)
A high-resolution spectroscopic method is developed for recording Raman spectra of molecular transitions in transient objects during a laser pulse with a resolution of {approx}0.1 cm{sup -1}. The method is based on CARS spectroscopy using a Fabry-Perot interferometer for spectral analysis of the CARS signal and detecting a circular interferometric pattern on a two-dimensional multichannel photodetector. It is shown that the use of the Dual-Broad-Band-CARS configuration to obtain the CARS process provides the efficient averaging of the spectral-amplitude noise of the CARS signal generated by a laser pulse and, in combination with the angular integration of the two-dimensional interference pattern, considerably improves the quality of interferograms. The method was tested upon diagnostics of the transient oxygen-hydrogen flame where information on the shapes of spectral lines of the Q-branch of hydrogen molecules required for measuring temperature was simultaneously obtained and used. (special issue devoted to the 90th anniversary of a.m. prokhorov)
- OSTI ID:
- 21466548
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Vol. 36, Issue 7; Other Information: DOI: 10.1070/QE2006v036n07ABEH013179; ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
Similar Records
Four-photon Rayleigh-wing spectroscopy of the aqueous solution of {alpha}-chymotrypsin protein
Direct amplification of picosecond pulses in F{sub 2}{sup -} : LiF crystals
Related Subjects
FABRY-PEROT INTERFEROMETER
FLAMES
HYDROGEN
INTERFERENCE
INTERFEROMETRY
LASER SPECTROSCOPY
LASERS
MOLECULES
OXYGEN
PULSES
RAMAN SPECTRA
RAMAN SPECTROSCOPY
RESOLUTION
SCATTERING AMPLITUDES
SIGNALS
TWO-DIMENSIONAL CALCULATIONS
AMPLITUDES
ELEMENTS
INTERFEROMETERS
MEASURING INSTRUMENTS
NONMETALS
SPECTRA
SPECTROSCOPY