title: Multispecies absorption spectroscopy of detonation events at 100  kHz using a fiber-coupled, time-division-multiplexed quantum-cascade-laser system.
abstract: A mid-infrared fiber-coupled laser system constructed around three time-division-multiplexed quantum-cascade lasers capable of measuring the absorption spectra of CO, CO2, and N2O at 100 kHz over a wide range of operating pressures and temperatures is demonstrated. This system is first demonstrated in a laboratory burner and then used to measure temperature, pressure, and concentrations of CO, CO2, and N2O as a function of time in a detonated mixture of N2O and C3H8. Both fuel-rich and fuel-lean detonation cases are outlined. High-temperature fluctuations during the blowdown are observed. Concentrations of CO are shown to decrease with time for fuel-lean conditions and increase for fuel-rich conditions.
authors.forename: Keith D
authors.initials: KD
authors.lastname: Rein
authors.forename: Sukesh
authors.initials: S
authors.lastname: Roy
authors.forename: Scott T
authors.initials: ST
authors.lastname: Sanders
authors.forename: Andrew W
authors.initials: AW
authors.lastname: Caswell
authors.forename: Frederick R
authors.initials: FR
authors.lastname: Schauer
authors.forename: James R
authors.initials: JR
authors.lastname: Gord