We developed a novel technique based on a short range supercontinuum Lidar for robust nonintrusive combustion diagnostics using just one inspection window. The approach enables simultaneous remote measurement of combustion gas parameters like temperature and concentration which plays a key role in the performance of combustion power plants. We demonstrate preliminary industrial scale measurement of water vapor temperature and concentration in a full scale boiler. Looking forward, we emphasize that the technique possesses a great potential for simultaneous 3D profiling of temperature and concentration, which can be achieved by varying the direction of the probe beam in a non-parallel plane.
We developed a short range Lidar system using a supercontinuum source spectrally tailored to cover the ro-vibrational transition energies of desired components of a flue gas. The system enables simultaneous remote measurements of the gas parameters, like temperature and concentration which play a key role in the performance of combustion power plants. The technique requires only one inspection window and can thus be used in combustion units with limited access. It exploits differential absorption between specific wavelength bands of the gas absorption spectrum. The transmittance of individual wavelength band is derived from the detected backscattered temporal intensity of the supercontinuum pulses. We demonstrate preliminary industrial measurement of water vapor temperature and concentration in a full scale boiler. The technique also enables 3D mapping of temperature and concentration.