Thermometry in pressurized, sooting flames using laser-induced gratings

Michael S. Brown, William L. Roberts

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


We have performed non-intrusive thermometry in rich ethylene/air flames using a frequency measurement based on laser-induced gratings. Light from a cw probe beam is coherently scattered from a thermal or electrostrictive grating induced by the pulsed pump beams. The Doppler modulation of the signal beam is determined by the local speed of sound from which a temperature can be extracted. Soot particles, acting as blackbody absorbers do contribute to the signal.

Original languageEnglish (US)
Pages (from-to)494
Number of pages1
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1997
Externally publishedYes
EventOptical Technology in Fluid, Thermal, and Combustion Flow III - San Diego, CA, United States
Duration: Jul 28 1997Jul 28 1997


  • Soot
  • Thermometry
  • Transient gratings
  • electrostriction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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