Andresen P, Bath A, Gröger W, Lülf H W, Meijer G, Meulen J J
Appl Opt. 1988 Jan 15;27(2):365-78. doi: 10.1364/AO.27.000365.
A new method for instantaneous temperature field measurements based on LIF studies of OH, O(2), and H(2)O in an open atmospheric flame with a tunable excimer laser is suggested. In this method the crucial problem of quenching at higher pressures is almost completely eliminated by excitation to a fast predissociating state. The various possible excitation and fluorescence processes that can be induced in the narrow tuning range of the KrF laser are characterized experimentally by excitation and dispersion spectra for the three molecules OH, O(2), and H(2)O. Of particular importance is the large power of the KrF laser, which allows efficient excitation of even weak transitions. The fast predissociation of these molecules in connection with the powerful excitation laser suggests that instantaneous temperature field measurements should be possible at higher pressures.
提出了一种基于可调谐准分子激光对开放大气火焰中OH、O(2)和H(2)O进行激光诱导荧光（LIF）研究的瞬时温度场测量新方法。在该方法中，通过激发到快速预解离态，几乎完全消除了高压下猝灭这一关键问题。在KrF激光的窄调谐范围内可诱导的各种可能的激发和荧光过程，通过对OH、O(2)和H(2)O这三种分子的激发光谱和色散光谱进行了实验表征。特别重要的是KrF激光的高功率，这使得即使是弱跃迁也能得到有效激发。这些分子的快速预解离与强大的激发激光相结合，表明在更高压力下进行瞬时温度场测量应该是可行的。
