高浓度的掺铒光纤在光传输以及光纤相关器件中都发挥着重要的作用。结合改进化学气相沉淀法(MCVD)的特点,采用“在线”溶液掺杂法制备预制棒,并对采用改进的石墨炉加热的MCVD法制备铋镓铝共掺的掺铒石英基光纤预制棒的工艺进行了讨论。特别探讨了疏松层沉积温度的重要性以及铋元素的作用机理,并给出了最佳沉积温度为1560℃~1600℃。利用仪器对制得的光纤进行了测试,给出了光纤的吸收谱、光纤预制棒芯子的扫描电子显微镜(SEM)图像以及用电子探针显微分析仪(EPMA)测得的光纤中各物质的含量,其中在1530 nm处得到的最高吸收系数为近60 dB/m,并利用光纤吸收谱估算得出铒离子浓度约为3.84×1025m-3。 High concentrations of erbium-doped fibers play an important role in optical transmission and in fiber-related devices. According to the characteristics of modified chemical vapor deposition (MCVD), preform rods were prepared by “online ” solution doping method, and the bismuth gallium aluminum co-doped erbium-doped silica fibers were prepared by MCVD with graphite furnace Great craft was discussed. In particular, the importance of deposition temperature and the action mechanism of bismuth are discussed. The optimum deposition temperature is 1560 ℃ ~ 1600 ℃. The prepared optical fiber was tested by means of an instrument, and the optical absorption spectrum of the optical fiber, the scanning electron microscope (SEM) image of the optical fiber preform core and the optical fiber measured by an electron probe microanalyzer (EPMA) The maximum absorption coefficient obtained at 1530 nm was nearly 60 dB / m. The estimated concentration of erbium ion was about 3.84 × 1025 m-3 using optical absorption spectra.