In-cylinder gas temperature and water concentration measurements in an HCCI engine using a multiplexed-wavelength diode laser system: Sensor development and initial demonstration
Mattison, D.W., Jeffries, J.B., Hanson, R.K., Steeper, R.R., De Zilwa, S., Dec, J.E., Sjoberg, M., & Hwang, W.Proceedings of the Combustion Institute, 31, 791, (2007).