Micro-pulling-down furnace modification and single crystal fibers growth

Dongsheng Yuan; Zhitai Jia; Yang Li; Baiyi Wu; Xutang Tao

doi:10.1117/12.2211220

16 March 2016 Micro-pulling-down furnace modification and single crystal fibers growth

Dongsheng Yuan, Zhitai Jia, Yang Li, Baiyi Wu, Xutang Tao

Proceedings Volume 9726, Solid State Lasers XXV: Technology and Devices; 97260E (2016) https://doi.org/10.1117/12.2211220
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

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 (μ-PD) has relatively small thermal gradient, and here we use μ-PD to carry out high quality SCFs. Through the μ-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.

Citation Download Citation

Dongsheng Yuan, Zhitai Jia, Yang Li, Baiyi Wu, and Xutang Tao "Micro-pulling-down furnace modification and single crystal fibers growth", Proc. SPIE 9726, Solid State Lasers XXV: Technology and Devices, 97260E (16 March 2016); https://doi.org/10.1117/12.2211220

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