Abstract

We demonstrate time-resolved simultaneous measurements of multiple hydrocarbons in high-temperature reacting and non-reacting mixtures using a broadband (instantaneous bandwidth 2.80–3.57 µm) subharmonic mid-infrared optical parametric oscillator based on orientation-patterned gallium phosphide. High-temperature absorption spectra and concentration time-histories of methane, ethane, and ethylene are measured at pressures around 2.3–2.7 atm and temperatures around 1235–1277 K in shock tube experiments.

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