本文利用红外分光光度仪，测定了ＧｅＯ２－ＳｉＯ２－ＴｉＯ２－Ｋ２Ｏ系统在４０００～２５０ｃｍ（－１）波数范围的反射比（Ｒ）。通过Ｋ－Ｋ关系式、数学处理和计算机运算、求出消光系数和红外折射率的方法，研究了本系统玻璃的反常色散规律。对结果进行了理论上的分析。发现本系统玻璃在１０００～４００ｃｍ（－１）波数区域内存在折射率（ｎ）小子１的现象，可用于研制传输ＣＯ２激光（９４０ｃｍ（－１））的空芯光纤材料。

Anomalous Dispersion Region Research of Glasses in the System GeO_2-TiO_2-SiO_2-K_2O Liu Jixiang;Zhao Xiujian;Yu Bo;Han Jianjun(Dept.of Material Eng.,WUT)The reflective indexes (R) of glasses in the system GeO2-SiO2-TiO2-K2O have been measured in the wavenumber range 4000～250cm(-1) using infrared spectrophoto meter. These data have been applied to calculate extinction coefficient and refractive index in the infrared region by K-K relation, arithmetic method and computer, we concluded the law of glasses anomalous dispersion. Furthermore, we analysed with theoretical acknowledge. In the range 1000～400cm(-1), we found a refractive index of less than unity. It demonstrated such material could be used as hollow-core waveguides for transmitting CO2 laser.:glass;anomalous dispersion;K-K relation;hollow-core waveguides