Single-beam coherent anti-Stokes Raman scattering spectroscopy of N2 using a shaped 7 fs laser pulse

The feasibility is explored by single-beam coherent anti-Stokes Raman scattering CARS spectroscopy of gas-phase diatomic molecules related to combusting flows, with implications for gas-phase thermometry. We demonstrate CARS of gas-phase N2 using a shaped 7 fs laser pulse, investigate the dependence of the CARS signal on the total pressure of the probed environment, both in pure N2 and in mixtures with Ar, discuss the observed signal-to-noise ratio, and suggest improvements to be considered for reliable single-shot measurements at flame temperatures. © 2009 American Institute of Physics. DOI: 10.1063/1.3207829

[1]  W. Roh,et al.  Pressure dependence of integrated CARS power. , 1978, Applied optics.

[2]  A. Eckbreth.  Laser Diagnostics for Temperature and Species in Unsteady Combustion , 1996 .

[3]  Sukesh Roy,et al.  Applications of ultrafast lasers for optical measurements in combusting flows. , 2008, Annual review of analytical chemistry.

[4]  Thomas Weinacht,et al.  Interference without an interferometer: a different approach to measuring, compressing, and shaping ultrashort laser pulses , 2008 .

[5]  Robert P Lucht,et al.  Theory of femtosecond coherent anti-Stokes Raman scattering spectroscopy of gas-phase transitions. , 2007, The Journal of chemical physics.

[6]  Stephen R. Leone,et al.  Single pulse phase-control interferometric coherent anti-Stokes Raman scattering spectroscopy (CARS) , 2005 .

[7]  J. Marangos,et al.  The generation of intense, transform-limited laser pulses with tunable duration from 6 to 30 fs in a differentially pumped hollow fibre , 2006 .

[8]  Yaron Silberberg,et al.  Femtosecond phase-and-polarization control for background-free coherent anti-Stokes Raman spectroscopy. , 2003, Physical review letters.

[9]  K. Kompa,et al.  Femtosecond CARS on H2 , 1999 .

[10]  Y. Silberberg,et al.  Standoff Detection of Solid Traces by Single-Beam Nonlinear Raman Spectroscopy Using Shaped Femtosecond Pulses , 2008 .

[11]  M. Schmitt,et al.  Femtosecond Time-Resolved CARS Spectroscopy on Binary Gas-Phase Mixtures: A Theoretical and Experimental Study of the Benzene/Toluene System , 1998 .

[12]  A. Eckbreth.  Laser Diagnostics for Combustion Temperature and Species , 1988 .

[13]  O. Svelto,et al.  Generation of high-energy 10-fs pulses by a new pulse compression technique , 1996, Summaries of papers presented at the Conference on Lasers and Electro-Optics.

[14]  Marcos Dantus,et al.  Standoff and arms-length detection of chemicals with single-beam coherent anti-Stokes Raman scattering. , 2009, Applied optics.

[15]  Sukesh Roy,et al.  Time-resolved dynamics of resonant and nonresonant broadband picosecond coherent anti-Stokes Raman scattering signals , 2005 .

[16]  Robert P. Lucht,et al.  Temperature measurements in reacting flows by time-resolved femtosecond coherent anti-Stokes Raman scattering (fs-CARS) spectroscopy , 2008 .