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用双色Z－SCAN法研究了热效应的弛豫过程，首次给出了为得到最大的测量灵敏度所满足的泵浦光束和参考光束的几何条件．在实验上对偶氮染料有机物热弛豫时间进行了测量。
The relaxation process of the thermal effect was studied by the two-color Z-SCAN method. The geometrical conditions of the pump beam and the reference beam for the maximum measurement sensitivity were given for the first time. The thermal relaxation time of organic azo dyes was experimentally measured.