Tunable Diode Laser Sensors for Combustion

  • Mark G. Allen
  • Shawn D. Wehe


High sensitivity monitoring of combustion species using compact semiconductor lasers began shortly after their invention in the mid 1970s, and included portable sensors for monitoring CO emissions from automobile exhausts and in-situ measurements in laboratory burners.1,2 Today, packages of multiple near-IR diode laser sensors are included by NASA as part of the atmospheric and environmental instrumentation suite of robotic Martian explorers. Significant attributes of Tunable Diode Laser (TDL) sensors based on absorption spectroscopy include: simplicity of design and operation, leading to fully autonomous sensors; high-speed wavelength tuning, leading to high bandwidth sensor response; and low-cost, rugged, and often fiber-coupled configurations, leading in turn to important applications in practical, industrial-scale combustor facilities. The combination of these attributes is direct monitoring of important combustion parameters such as temperature, velocity, mass flux, and individual species concentration levels.3–5


Tunable Diode Laser Difference Frequency Generation Supersonic Combustion Combustion Flow Optical Metrology 
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Copyright information

© Springer Science+Business Media New York 2003

Authors and Affiliations

  • Mark G. Allen
    • 1
  • Shawn D. Wehe
    • 1
  1. 1.Physical Sciences, Inc.USA

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