System for Measuring High-Temperature, Gas-Phase Reaction Kinetics Using Mid-Infrared Spectroscopy

Technology #11561

Key Points

  • Portable system measures high-temperature gases via broadband laser absorption spectroscopy in the mid-infrared (MIR) spectral range
  • Comprises a compact subharmonic optical parametric oscillator and a dual-channel, high-speed spectrometer
  • Uses a single line-of-sight measurement to simultaneously analyze multiple gas species and provide the temperature and composition of each

Abstract

The University of Central Florida invention is a portable system for obtaining fast time‐resolved measurements of the temperature and composition of high-temperature gases via broadband laser absorption spectroscopy in the mid‐infrared spectral range. A compact, portable subharmonic optical parametric oscillator is used as a bright and spatially coherent broadband source in the mid‐infrared to probe samples of hot gases. A dual‐channel, high‐speed spectrometer records the spectral intensity profiles of the probe beam before and after transmission through the gas sample to obtain absorption spectra at each point in time from which properties of the probed gas may be determined.