Normal fluorescence performance part or chapter atoms in choice allowable range, from the high-energy state to the low-energy state of consciousness.On the plane, in the process of laser induced fluorescence PLIF can be laser populated state, laser frequency and the excited state and low-energy state resonance, respectively, in order to obtain the highest efficiency upper state, to get the strongest fluorescent lights with flags.Of stimulated after laser energy state will experience the following process: (1) the member to the initial state of stimulated emission of radiation;(2) receiving another photon excited to a higher member state or the ionization state: (3) the system of internal energy can pass by with other member inelastic collision, or vibrational energy transfer, migration changes can also be electron energy transfer, the latter is often referred to as quenching;(4) part in the interaction between atoms, respectively, the collision or half collision, internal energy transfer or part dissociation;(5) the original settlement and direct settlement through the process of collision energy state, near emission fluorescence, PLIF a standard lights.Planar laser induced fluorescence PLIF with light intensity is the temperature, pressure, mole fraction and other known parameters of the function.In fire there is too much high fluorescence quenching speed of oxygen and nitrogen, as usual to find fluorescent lights with flags associated with pressure;Pull out the appropriate encourage level can make the fluorescence intensity in a certain range as a weak function of the temperature, so much, if the laser intensity and array receiver after revised, the average stop can obtain only is proportional to the concentration of fluorescent lights with flags.
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