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采用实时光学二次谐波产生（ＳＨＧ）测量方法，以两亲性分子半花菁为掺杂探针分子，对溶胶凝胶技术制备的玻璃薄膜的凝胶干燥的动态过程进行了研究．结合紫外—可见吸收光谱的测量，发现：因两亲性分子在膜中的自取向性可诱导出二阶光学非线性，溶胶凝胶技术制备的有机／无机复合膜的凝胶干燥过程可通过薄膜ＳＨＧ强度的变化半定量地反映．凝胶干燥收缩导致有序掺杂分子数减少，膜片的光学非线性减弱．该过程随薄膜处理温度的升高而急剧缩短；另外，有机分子在膜中的聚集程度随膜片处理温度的增加而很快减少．
The dynamic process of gel drying of glass films prepared by sol-gel technique was studied by using real-time optical second harmonic generation (SHG) measurement method and amphipathic molecule hemicyanine as probe molecules. According to the UV-Vis absorption spectra, it was found that the second-order optical nonlinearity can be induced by the self-orientation of amphiphilic molecules in the film. The gel-drying process of organic / inorganic composite films prepared by sol- The change of the SHG intensity of the film is semi-quantitatively reflected. Dry shrinkage of gel leads to the decrease of the number of ordered dopant molecules and the optical nonlinearity of the patch. The process decreases sharply with the increase of the film temperature. In addition, the aggregation degree of the organic molecules in the film decreases rapidly with the increase of the film processing temperature.