Communication: Two-dimensional gas-phase coherent anti-Stokes Raman spectroscopy (2D-CARS): Simultaneous planar imaging and multiplex spectroscopy in a single laser shot

2013 ◽  
Vol 138 (22) ◽  
pp. 221101 ◽  
Author(s):  
Alexis Bohlin ◽  
Christopher J. Kliewer
Keyword(s):  
Raman Spectroscopy ◽  
Gas Phase ◽  
Laser Shot ◽  
Two Dimensional ◽  
Planar Imaging ◽  
Single Laser ◽  
Anti Stokes

Crossed Two-Beam Coherent Anti-Stokes Raman Spectroscopy in Dispersive Media

2003 ◽  
Vol 57 (1) ◽  
pp. 93-99 ◽  
Author(s):  
Michael J. Papac ◽  
Jonathan D. Posner ◽  
Derek Dunn-Rankin
Keyword(s):  
Raman Spectroscopy ◽  
Gas Phase ◽  
Matching Condition ◽  
Laser Beams ◽  
Dispersive Media ◽  
Phase Matching ◽  
Optical Wave ◽  
Fitting Procedure ◽  
Phase Matching Condition ◽  
Anti Stokes

Coherent anti-Stokes Raman spectroscopy (CARS) is a nonlinear optical wave mixing process that is used in gas-phase systems to determine the energy distribution of the probed species (usually N2) and, through a fitting procedure, the temperature giving rise to it. CARS signal strengths are maximized when the phase matching condition is met. Because gases are generally non-dispersive, this phase matching condition can be found geometrically as a function of the crossing angles between the CARS beams and their wavelengths. In addition, perfect phase matching in non-dispersive media occurs automatically for collinear beams. To improve spatial resolution, however, intersecting the laser beams is desirable. Being a third-order process, phase matching for CARS in gases typically requires three input laser beams. This paper discusses and demonstrates the issues of phase matching for CARS when the medium is dispersive, and the ability for CARS phase matching to occur with only two crossed laser beams (one pump and one probe). This two-beam X-CARS in dispersive media can be used as an alignment tool for gas-phase CARS and may be relevant as a simpler diagnostic in high-pressure environments. The paper also discusses the effects of non-ideal phase matching in dispersive and non-dispersive media.

Single-laser-shot detection of nitric oxide in reacting flows using electronic resonance enhanced coherent anti-Stokes Raman scattering

2008 ◽  
Vol 93 (9) ◽  
pp. 091115 ◽  
Author(s):  
Ning Chai ◽  
Sameer V. Naik ◽  
Normand M. Laurendeau ◽  
Robert P. Lucht ◽  
Sukesh Roy ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Raman Scattering ◽  
Reacting Flows ◽  
Laser Shot ◽  
Single Laser ◽  
Shot Detection ◽  
Anti Stokes ◽  
Electronic Resonance

Theoretical modeling of single-laser-shot, chirped-probe-pulse femtosecond coherent anti-Stokes Raman scattering thermometry

2011 ◽  
Vol 104 (3) ◽  
pp. 699-714 ◽  
Author(s):  
D. R. Richardson ◽  
R. P. Lucht ◽  
W. D. Kulatilaka ◽  
S. Roy ◽  
J. R. Gord
Keyword(s):  
Raman Scattering ◽  
Probe Pulse ◽  
Theoretical Modeling ◽  
Laser Shot ◽  
Single Laser ◽  
Anti Stokes

Coherent Anti-Stokes Raman Spectroscopy of the Stretching Vibrations of the Water Isotopomers

1992 ◽  
Vol 46 (7) ◽  
pp. 1149-1155 ◽  
Author(s):  
D. David ◽  
A. Strugano ◽  
I. Bar ◽  
S. Rosenwaks
Keyword(s):  
Raman Spectroscopy ◽  
Gas Phase ◽  
Room Temperature ◽  
Population Distribution ◽  
Calculated Spectrum ◽  
Moderate Resolution ◽  
Stretching Vibrations ◽  
Rotational Transitions ◽  
Anti Stokes ◽  
First Time

Coherent anti-Stokes Raman spectroscopy (CARS) has been employed to study the v1 band of H2O, v1 band of DzO, and v1 and v3 bands of HOD in the gas phase at room temperature and at moderate resolution. These molecules are characterized by a complicated spectrum which is not completely rotationally resolved. A method for the deconvolution of incompletely resolved CARS spectra has been utilized, in which a Boltzmann population distribution is assumed. The calculated spectrum nearly exactly reproduces the observed spectrum and allows assignment of the rotational transitions which are observed in the spectra. All the transitions that appear in these spectra belong to the isotropic Q branches. The CARS spectra of D2O and HOD are studied here for the first time.

Single-laser-shot femtosecond coherent anti-Stokes Raman scattering thermometry at 1000Hz in unsteady flames

2011 ◽  
Vol 33 (1) ◽  
pp. 839-845 ◽  
Author(s):  
Daniel R. Richardson ◽  
Robert P. Lucht ◽  
Sukesh Roy ◽  
Waruna D. Kulatilaka ◽  
James R. Gord
Keyword(s):  
Raman Scattering ◽  
Laser Shot ◽  
Single Laser ◽  
Anti Stokes
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