[1] D J Richardson, J Nilsson, W A Clarkson. High power fiber lasers: current status and future perspectives. JOSA B, 27, B63-B92(2010).

[2] Pengfei Ma, Hu Xiao, Jinyong Leng, et al. Beyond 4 kW narrow-linewidth and near single-mode fiber laser. Infrared and Laser Engineering, 50, 20200421(2021).

[3] Xubao He, Hu Xiao, Pengfei Ma, et al. 2.3 kW fiber laser spectral beam combination based on dichromatic mirror. Infrared and Laser Engineering, 50, 20200385(2021).

[4] Yinliang Zhang, Yun Tu, Shandong Tu, et al. Interfacial bonding strength of multilayer metal-coated optical fiber. Materials for Mechanical Engineering, 40, 6(2016).

[5] J M O Daniel, N Simakov, A Hemming, et al. Metal clad active fibres for power scaling and thermal management at kW power levels. Optics Express, 24, 18592-18606(2016).

[6] Youjun Wang, Qingli Xin, Xiaomei Cai, et al. Study on characteristics of metal coated fiber. China Building Materials Science & Technology, 1, 34-37(1992).

[7] H S Seo, U C Peak, K Oh, et al. Metal coating of tin on silica optical fiber. Journal of Lightwave Technology, 16, 2355-2364(1998).

[8] C Lupi, F Felli, L Ippoliti, et al. Metal coating for enhancing the sensitivity of fibre Bragg brating sensors at cryogenic temperature. Smart Materials and Structures, 14, 71(2005).

[9] J F Xie, H Zhang, Z Zhu, et al. A study of the temperature sensitivity of fiber Bragg gratings after metallization. Smart Materials and Structures, 16, 1837-1842(2007).

[10] [10] Wei Zhongcheng, He Fangrong, Wang Yufen. Preparation Technology of Fiber Materials[M]. Beijing: Beijing University of Posts Telecommunications Press, 2016: 111. (in Chinese)

[11] [11] Xian Aiping, Wang Lianwen. The Physical Properties of Liquid Metals[M]. Beijing: Science Press, 2006: 185186. (in Chinese)