Shi Tengfei, Zhou Zhiguang, Ni Li, Xiao Xusheng, Zhan Huan, Zhang Aidong, Lin Aoxiang
Appl Opt. 2014 May 20;53(15):3191-5. doi: 10.1364/AO.53.003191.
We reported on a highly effective chelate precursor doping technique for Yb-doped large-mode-area (LMA) fiber manufacture. By accurately controlling the evaporation temperature and flow rate of carrier gas, the chelate precursor doping technique is capable of making Yb-doped LMA silica fiber with good uniformity free of center dip, low numerical aperture of ~0.056, large preform core size of 4.46 mm, and appropriate cladding absorption of 1.17 dB/m at 976.4 nm. Based on a single-end-pump all-fiber oscillator laser setup, the laser output at 1080 nm reached 700 W with slope efficiency of 54.2%.
我们报道了一种用于制造掺镱大模场面积（LMA）光纤的高效螯合前驱体掺杂技术。通过精确控制蒸发温度和载气流量，螯合前驱体掺杂技术能够制造出均匀性良好、无中心凹陷、数值孔径低至约0.056、预制棒纤芯尺寸大至4.46毫米且在976.4纳米处包层吸收为1.17 dB/m的掺镱LMA石英光纤。基于单端泵浦全光纤振荡器激光装置，1080纳米处的激光输出功率达到700瓦，斜率效率为54.2%。
