Mid-infrared gas sensing for combustion applications

Jay B. Jeffries, Adam E. Klingbeil, Ethan A. Barbour, Aamir Farooq, Ronald K. Hanson

Research output: Contribution to journalArticlepeer-review


Progress is reported in the use of room-temperature, wavelength-tunable, solidstate mid-infrared (mid-IR) laser sensors for combustion and propulsion applications. Two such laser technologies have recently become commercially available: DFB tunable diode lasers near 2.7 μm and difference frequency generation (DFG) lasers near 3.3 μm. These lasers access the strong transitions in the fundamental O-H and C-H stretching vibrations as well as the ν1+ν3 and 2ν2+ν3 combination bands of CO2. These new laser sources provide the potential for sensitive detection of hydrocarbon fuels and combustion products H2O and CO2 in a wide variety of environments. Recent results in pulse detonation engines, laboratory flames, and shock-heated ignition experiments illustrate the potential of these tunable mid- IR laser sources for a wide variety of practical combustion applications.

Original languageEnglish (US)
JournalOptics InfoBase Conference Papers
StatePublished - 2008
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation
  • Atomic and Molecular Physics, and Optics


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