Experimental Study of Vibrational and Pure Rotational Coherent Anti-Stokes Raman Scattering (CARS) in Molecular Hydrogen
نویسنده
چکیده
Using a specially designed excimer-laser-pumped dye laser of adjustable bandwidth high-lying pure rotational transitions of both, orthoand para-hydrogen have been identified by coherent anti-Stokes Raman scattering (CARS). As an interesting application Hz-based CARS-thermometry is discussed.
منابع مشابه
Coherent Anti-Stokes Raman Spectroscopy (CARS) Applied in Combustion Probing
\Ye have applied Coherent Anti-Stokes Raman Spectroscopy (CARS) for monitoring of a variety of important molecules in combustion media. A survey of different CARS techniques ranging from simple, scanning measurements of major species like N , to single-pulse, broad-band arraydetector registration of less abundant species is made. The CARS, BOXCARS and folded BOXCARS approaches were used observi...
متن کاملCARS-Background Suppression by Phase-Controlled Nonlinear Interferometry
We have developed a new technique for efficient suppression of the nonresonant background in coherent anti-Stokes Raman scattering (CARS). The advantage of this technique, which is based upon phase-controlled superposition of an appropriately selected reference signal, is presented in theory and demonstrated experimentally by the example of the S(3) (pure rotational) transition of molecular hyd...
متن کاملCoherent Anti-Stokes Raman Scattering Microscopy: Instrumentation, Theory, and Applications
Coherent anti-Stokes Raman scattering (CARS) microscopy permits vibrational imaging with high-sensitivity, high speed, and three-dimensional spatial resolution. We review recent advances in CARS microscopy, including experimental design, theoretical understanding of contrast mechanisms, and applications to chemical and biological systems. We also review the development of multiplex CARS microsp...
متن کاملDual-pump vibrational/rotational femtosecond/picosecond coherent anti-Stokes Raman scattering temperature and species measurements.
A method for simultaneous ro-vibrational and pure-rotational hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering (fs/ps CARS) is presented for multi-species detection and improved temperature sensitivity from room temperature to flame conditions. N₂/CH₄ vibrational and N₂/O₂/H₂ rotational Raman coherences are excited simultaneously using fs pump pulses at 660 and 798 nm, respect...
متن کاملHybrid femtosecond/picosecond coherent anti-Stokes Raman scattering for gas-phase temperature measurements
Hybrid femtosecond/picosecond coherent anti-Stokes Raman scattering (fs/ps CARS) is employed for quantitative gas-phase temperature measurements in combustion processes and heated flows. In this approach, ultrafast 100-fs laser pulses are used to induce vibrational and rotational transitions in N2 and O2, while a third spectrally narrowed picosecond pulse is used to probe the molecular response...
متن کامل