| Popis: |
We demonstrate that picosecond pump–probe spectroscopy can be used to acquire quantitative two-dimensional images of species in flames, using a loss-modulation-based two-dimensional phase-sensitive detection system mounted in front of a CCD camera. This system is currently limited to detection of 1% modulation depth, but it can be significantly improved. The instrument permits high data collection rates, and it provides a quenching-independent signal without the need for calibration. The signal is embedded in a coherent laser beam, making it possible to perform optical processing before the camera. |
