Single-Beam Coherent Anti-Stokes Raman Scattering Spectroscopy of N2 Using a Shaped 7 fs Laser Pulse

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2009
Accession Number
ADA511000

Entities

People

  • Dmitry Pestov
  • James. R. Gord
  • Marcos Dantus
  • Paul Wrzesinski
  • Sukesh Roy
  • Tissa Gunaratne

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Diatomic Molecules
  • Electromagnetic Scattering
  • Femtosecond Lasers
  • Femtosecond Time
  • High Pressure
  • Information Operations
  • Laser Beams
  • Laser Pulses
  • Lasers
  • Measurement
  • Photons
  • Raman Scattering
  • Scattering
  • Spectroscopy
  • Wave Mixing

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Molecular Photonics/Laser Physics

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers