【摘要】 <正> 经过不少研究工作者的努力,硫系玻璃的透过波长区域现已达到0.8～19μm,由于硫系玻璃易于制成各种形状的片状器件,而且化学稳定性比卤化物晶体好,所以在不能使用KBr晶体的地方,就可以用硫系玻璃代替作窗口材料。用它作芯材拉制的光导纤维,已用更多还原

【Abstract】 Metal and non-metal impurities, in particular oxygen, in chalcogenide glasses are of harmful effects on their optical properties. Even if oxide content in glasses is as low as 10-2%, it would cut off optical transmission at 11μm. By eliminating oxides in glasses their optical transmission region will extend evidently, that is from 0.7-11μm to 0.7-18μm. In this paper the methods of measuring trace amount oxygen and the possible sources of oxygen are discussed and the methods of eliminating oxygen are proposed. Results of the examination show that by using these methods the oxygen content in glasses can be reduced down to 10-20 ppm, so that the light loss of optical fibres used for 10.6μm CO2 laser is less than 5dB/M.更多还原