制备了低杂质吸收的Ge_(20)Sb_(15)Se_(65)硫系玻璃并拉制了不同直径的光纤,进行了10.6μm CO_2激光导能实验。实验结果表明,制备的Ge20Sb15Se65硫系玻璃具有良好的抗析晶特性,在5~11μm波段透过率约为64%。在高功率CO_2激光作用下,Ge20Sb15Se65玻璃光纤端面会出现熔融损伤,原因在于光吸收产生的热堆积导致光纤端面温度快速升高。当光纤直径为800μm、长度为430mm、输入端功率为5267mW时,输出功率最大,为809mW,输出功率密度为161 W/cm~2,传输效率为16%,实验结果与理论计算结果基本相符。 The Ge_ (20) Sb_ (15) Se_ (65) chalcogenide glass with low impurity absorption was prepared and the optical fibers with different diameters were drawn. The laser induced experiment of 10.6 μm CO_2 was carried out. The experimental results show that the prepared Ge20Sb15Se65 chalcogenide glass has good anti-crystallization properties and has a transmittance of about 64% in the band of 5 to 11 μm. Under the action of high-power CO 2 laser, the fusion damage occurs on the end face of Ge20Sb15Se65 glass fiber because the heat accumulation caused by light absorption causes the temperature of fiber end face to rapidly increase. When the fiber diameter is 800μm, the length is 430mm and the input power is 5267mW, the maximum output power is 809mW, the output power density is 161 W / cm ~ 2 and the transmission efficiency is 16%. The experimental results are in good agreement with the theoretical calculation.