低损耗芯包结构Ge-Sb-Se 硫系玻璃光纤的制备与性能研究

为解决锗(Ge)基硫系玻璃光纤损耗相对较高等问题,采用物理和化学除杂相结合的工艺,制备出了高纯Ge28Sb12Se60硫系玻璃,显著降低了红外波段C、H、O 杂质吸收。应用真空高速旋转法,制备出了壁厚均匀、光学质量优异的Ge28Sb12Se58S2 硫系玻璃皮管。采用棒管法拉制出外径501.5 um、具有芯包结构的Ge-Sb-Se 硫系玻璃光纤,光纤弯曲半径为5 mm,红外波段吸收基线为2.2 dB/m(2.87 um和4.5 um 处除外)。

Preparation and properties of low-loss core-cladding structural Ge- Sb- Se chalcogenide glass fibers

For solving the problems about Ge system chalcogenide glass fiber's relatively high loss, etc, high-purity Ge28Sb12Se60 glass was prepared by chemical and physical methods of purification. The absorptions caused by C, H, O impurities were obviously reduced in IR band. Ge28Sb12Se58S2 chalcogenide glass tube with precision wall and fine optical properties was prepared by means of tube-rotating technique. Fibers with core-cladding structure were drawn by rod-in-tube method. The diameter of the fiber is 501.5 um and the bending test showed the diameter of the circle is 5 mm. The fiber loss is 2.2 dB/m (except those at 2.87 and 4.5 um).