溶胶-凝胶法稀土平面光波导薄膜研究进展

简单介绍了溶胶-凝胶方法的特点、平面光波导的基本结构及工艺特点;简要回顾了国内外近年来无机薄膜、复合薄膜、稀土配合物在工艺、合成、性能、机理等方面的研究情况.与传统的无机平面光波导薄膜相比,有机-无机复合薄膜具有明显的优势,可以在低温下一次拉制成具有实用价值的平面光波导厚膜.稀土配合物的发展解决了稀土与复合薄膜中有机组分不相容、掺杂浓度低的问题.因此,稀土配合物是制作有源平面光波导复合薄膜的理想材料.

Progress in Study on Rare Earth Planar Optical Waveguide Thin-film Prepared by Sol-gel Process

This paper introduces the sol-gel technique, the basic structure and technical characteristic of planar waveguide films. The developments of inorganic films, organic-inorganic hybrid films, rare earth chromophore are reviewed with the emphasis on preparation methods, synthesis, properties and the mechanism. Comparing with inorganic films, hybrid films have the obvious advantages. Thick film can be made in one time through sol-gel method at the room temperature, which has the practical value. The development of rare earth chromophore solves the incompatibility of rare earth with the organic component in the hybrid films, thus the concentration of rare earth can be greatly improved. Rare earth chromophore is then considered as the perfect candidate for making active planar waveguide films.