标题：Micro-pulling-down furnace modification and single crystal fibers growth
作者：Yuan, Dongsheng; Jia, Zhitai; Li, Yang; Wu, Baiyi; Tao, Xutang
作者机构：[Yuan, Dongsheng; Jia, Zhitai; Li, Yang; Wu, Baiyi; Tao, Xutang] Shandong Univ, State Key Lab Crystal Mat, 27 South Shanda Rd, Jinan 250100, Peoples R 更多
会议名称：Conference on Solid State Lasers XXV - Technology and Devices
会议日期：FEB 15-18, 2016
来源：SOLID STATE LASERS XXV: TECHNOLOGY AND DEVICES
关键词：Micro-pulling-down (mu-PD); Single crystal fibers (SCFs); Y3Al5O12; (YAG); Lu3Al5O12 (LuAG)
摘要：Single crystal fiber (SCF) combines the excellent instinct properties of conventional bulk laser crystals, and the special geometry advantage of active optical fibers. YAG and LuAG are proper host candidates for single crystal fiber laser with high thermal conductivity. Despite a lower thermal conductivity for pure crystal than YAG, LuAG crystal is easier to obtain homogeneous optical quality, and has a thermal conductivity nearly independent from the doping level. Micropulling- down (mu-PD) has relatively small thermal gradient, and here we use mu-PD to carry out high quality SCFs. Through the mu-PD furnace manufactured by ourselves, crystal fibers with different diameters have been grown successfully. We designed and fabricated a method to adjust the thermal distribution, and with the favor of pulling-down rate, the specific diameter can be controlled perfectly. The crystalline quality and homogeneity along the whole fiber were investigated, and LuAG SCF was confirmed to have a fine crystal quality for laser.