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随着高功率CO_2激光器的迅速发展,从不同的物理性质和化学性质的材料中,选择最适宜的红外激光器窗材料是一个重要问题.从目前应用的几种激光器窗材料来看,KC1和NaC1机械性能差,易潮解,Ge的吸收系数较大,都不是较好的高功率激光器窗材料.因而进一步提高GaAs的性能,就仍有其实际意义. 自1979年以来,冶金部有色金属研究总院采用液封直拉工艺,研制成复合型半绝缘GaAs材料,此种材料的吸收系数低,透射率高,热稳定性能良好,能承受高功率CO_2激光,而且大大降低了成本,可作为一种优良的千瓦级CO_2激光器窗材料.我们利用光声光谱方法,对有色金属研究总院研制的复合型半绝缘 GaAs材料在10.6μm的红外吸收进行了研究,并与掺Cr半绝缘单晶等材料作了对比,测量结果表明,复合型半绝缘GaAs
With the rapid development of high-power CO 2 laser, it is an important issue to select the most suitable infrared laser window materials from different physical and chemical materials.From the current application of several laser window materials, KC1 and NaC1 Mechanical properties are poor, easy deliquescence, Ge larger absorption coefficient, are not good high-power laser window material.Therefore, to further improve the performance of GaAs, there is still practical significance.Since 1979, the Ministry of Metallurgical Research non-ferrous metals The hospital adopts a liquid-sealed Czochralski process to develop a composite semi-insulating GaAs material which has a low absorption coefficient, high transmittance and good thermal stability, can withstand high-power CO 2 laser and greatly reduces the cost and can be used as a A kind of excellent kilowatt CO2 laser window material.We used the photoacoustic spectroscopy method to study the IR absorption of the composite semi-insulating GaAs material developed by the Nonferrous Metal Research Institute at 10.6μm, and compared with the Cr-doped semi-insulating single crystal Materials were compared, the measurement results show that composite semi-insulating GaAs