[2] [2] LIU B, KARKI D, BERA S, et al. Fabrication and application of single crystal fiber via laser heated pedestal growth system［C］//Fiber Optic Sensors and Applications XVII. April 12-17, 2021. Online Only, USA. SPIE, 2021.

[4] [4] ANDRADE E N D C. The flow in metals under large constant stresses［J］. Proceedings of the Royal Society of London Series A, Containing Papers of a Mathematical and Physical Character, 1914, 90(619): 329-342.

[5] [5] SANGLA D, MARTIAL I, AUBRY N, et al. High power laser operation with crystal fibers［J］. Applied Physics B, 2009, 97(2): 263-273.

[6] [6] DLEN X, PIEHLER S, DIDIERJEAN J, et al. 250 W single-crystal fiber Yb∶YAG laser［J］. Optics Letters, 2012, 37(14): 2898-2900.

[7] [7] SOLEIMANI N, PONTING B, GEBREMICHAEL E, et al. Coilable single crystals fibers of doped-YAG for high power laser applications［J］. Journal of Crystal Growth, 2014, 393: 18-22.

[8] [8] KIM W, SHAW B, BAYYA S, et al. Crystal fiber lasers［C］//Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications Ⅺ. August 6-10, 2017. San Diego, USA. SPIE, 2017.

[10] [10] DAI Y, ZHANG Z H, WANG Y X, et al. Growth of Tm∶Lu3Al5O12 single crystal fiber from transparent ceramics by laser-heated pedestal method and its spectral properties［J］. Optical Materials, 2021, 111: 110674.

[11] [11] WANG T, ZHANG J, YANG L, et al. Fabrication and sensitivity optimization of garnet crystal-fiber ultrasonic temperature sensor［J］. Journal of Materials Chemistry C, 2020, 8(11): 3830-3837.

[12] [12] WANG Y X, WANG S Z, WANG J Y, et al. High-efficiency ~2 μm CW laser operation of LD-pumped Tm3+∶CaF2 single-crystal fibers［J］. Optics Express, 2020, 28(5): 6684.

[13] [13] ZHAO Y G, WANG L, CHEN W D, et al. 35 W continuous-wave Ho∶YAG single-crystal fiber laser［J］. High Power Laser Science and Engineering, 2020, 8: e25.

[14] [14] LIU J, DONG J F, WANG Y Y, et al. Laser operation of Tm∶LuAg single-crystal fiber grown by the micro-pulling down method［J］. Crystals, 2021, 11(8): 898.

[15] [15] ZHANG N, YIN Y Q, ZHANG J, et al. Optimized growth of high length-to-diameter ratio Lu2O3 single crystal fibers by the LHPG method［J］. Cryst Eng Comm, 2021, 23(7): 1657-1662.

[16] [16] WANG T, WANG H Y, ZHANG J, et al. Design and directional growth of (Mg1-xZnx)(Al1-yCry)2O4 single-crystal fibers for high-sensitivity and high-temperature sensing based on lattice doping engineering and acoustic anisotropy［J］. Advanced Functional Materials, 2021, 31(42): 2103224.

[17] [17] AN N, ZHOU H L, ZHU K S, et al. Improved temperature sensing performance of YAG∶Ho3+/Yb3+ by doping Ce3+ ions based on up-conversion luminescence［J］. Journal of Alloys and Compounds, 2020, 843: 156057.

[18] [18] ANDREETA M R B, HERNANDES A C. Laser-heated pedestal growth of oxide fibers［M］.Berlin: Springer Handbook of Crystal Growth, 2010: 393-432.