激光加热基座法生长高质量Yb3+掺杂Y3Al5O12单晶光纤

doi:10.15541/jim20200475

无机材料学报 ›› 2021, Vol. 36 ›› Issue (7): 761-765.DOI: 10.15541/jim20200475

所属专题：【虚拟专辑】透明陶瓷与光学晶体；【信息功能】透明陶瓷与光学晶体

激光加热基座法生长高质量Yb³⁺掺杂Y₃A_l5O₁₂单晶光纤

戴云¹(), 张中晗¹, 苏良碧¹, 李金², 龙勇², 丁雨憧², 武安华¹()

1.中国科学院上海硅酸盐研究所, 中国科学院透明光功能无机材料重点实验室, 上海 201899
2.中国电子科技集团公司第二十六研究所, 重庆 400060

收稿日期:2020-08-19 修回日期:2020-09-29 出版日期:2021-07-20 网络出版日期:2020-12-01
通讯作者: 武安华, 研究员. E-mail:wuanhua@mail.sic.ac.cn
作者简介:DAI Yun (1994-), male, Master candidate. E-mail:daiyuncugb@163.com

Growth of High-quality Yb³⁺-doped Y₃Al₅O₁₂ Single Crystal Fiber by Laser Heated Pedestal Growth Method

DAI Yun¹(), ZHANG Zhonghan¹, SU Liangbi¹, LI Jin², LONG Yong², DING Yuchong², WU Anhua¹()

1. Key Laboratory of Transparent Optical Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
2. No.26 Research Institute of China Electronics Technology Group Corporation, Chongqing 400060, China

Received:2020-08-19 Revised:2020-09-29 Published:2021-07-20 Online:2020-12-01
Contact: WU Anhua, professor. E-mail:wuanhua@mail.sic.ac.cn
About author:戴云(1994-), 男, 硕士研究生. E-mail:daiyuncugb@163.com
Supported by:
Instrument Developing Project of the Chinese Academy of Sciences(YJKYYQ20170019);International Partnership Program of Chinese Academy of Sciences(121631KYSB20180045);National Natural Science Foundation of China(51872309);National Natural Science Foundation of China(U1832106)

摘要/Abstract

摘要：

单晶光纤即具有光纤形态的单晶材料, 是功能晶体材料一维化发展的重要体现。单晶光纤兼具单晶材料优异的光学性能和激光光纤散热效率高、光束质量高等特点, 有望解决传统玻璃材质激光光纤非线性效应强、热导率低等瓶颈问题, 实现激光峰值功率、脉冲能量等性能的突破。本工作采用自主研制的激光加热基座(Laser-heated Pedestal Growth, LHPG)单晶光纤炉制备了两组Ф0.2 mm×710 mm的Yb³⁺掺杂Y₃Al₅O₁₂(Yb:YAG)单晶光纤, 并对其进行了表征。制备的单晶光纤长径比大于3500, 直径波动小于5%, 且表现出一定的柔韧性; X射线摇摆曲线测试结果显示Yb:YAG单晶光纤的结晶质量与所用源棒相比有所提升; EDS线扫描结果证明单晶光纤中的Yb³⁺沿轴向呈现均匀分布。实验结果表明: 准一维化的单晶光纤具有良好的结晶质量与光学均匀性, 有望成为一种性能优异的高功率激光增益材料。

关键词: 激光加热基座法(LHPG), Yb:YAG单晶光纤, 激光晶体

Abstract:

Single-crystal fiber (SCF) is a fiber-shaped monocrystalline material, which is an important tendency for the development of low-dimensional functional crystals. Combining the excellent optical properties of bulk crystals and the high-efficient thermal dissipation as well as the high beam quality of optical fibers, SCFs are believed to solve the bottlenecks of conventional laser fibers such as unfavorable non-linear effects and poor thermal conductivities, can thus achieve higher laser peak powers and pulse energy. Here, we describe the results of synthesis and characterization of two Yb³⁺-doped Y₃Al₅O₁₂ (Yb:YAG) SCFs (Ф0.2 mm×710 mm), which were grown by a self- developed laser-heated pedestal growth (LHPG) apparatus. The prepared SCFs possess a length-to-diameter ratio greater than 3500, a diameter fluctuation less than 5%, and show high flexibility for bending. The analysis of X-ray rocking curve indicates that the crystallinity of the grown SCF is improved compared with that of the source rod. The EDS line scan shows that the Yb³⁺ ions are uniformly distributed along the axial direction. Results of these characterizations of SCFs indicate that SCFs maintains excellent crystallinity and high optical homogeneity, showing promising candidate for high-power laser applications.

Key words: laser-heated pedestal growth (LHPG), Yb:YAG SCFs, laser crystal

中图分类号:

TQ174

戴云, 张中晗, 苏良碧, 李金, 龙勇, 丁雨憧, 武安华. 激光加热基座法生长高质量Yb³⁺掺杂Y₃A_l5O₁₂单晶光纤[J]. 无机材料学报, 2021, 36(7): 761-765.

DAI Yun, ZHANG Zhonghan, SU Liangbi, LI Jin, LONG Yong, DING Yuchong, WU Anhua. Growth of High-quality Yb³⁺-doped Y₃Al₅O₁₂ Single Crystal Fiber by Laser Heated Pedestal Growth Method[J]. Journal of Inorganic Materials, 2021, 36(7): 761-765.

图/表 11

Fig. 1 Schematic diagram of the LHPG technique

Fig. 2 Pictures of as-grown Yb:YAG SCFs (a) 1at% Yb:YAG; (b) 2at% Yb:YAG

Fig. 3 Different magnification SEM microphotographs of the 1at% Yb:YAG SCF

Fig. 4 Photographs of melt zone in the process of fiber growth (a) Symmetrical zone configuration; (b) Asymmetric zone configuration

Fig. 5 Process diagram for controlling the diameter of a SCF

Fig. 6 Variation of diameter along the fibers

Fig. 7 X-ray rocking curves of the (111) crystal plane of the Yb:YAG SCFs and source rod

Table 1 FWHM of Yb:YAG SCFs and source rods

No.	Sample	FWHM/(″)
1	1at% Yb:YAG SCF	111.6
2	1at% Yb:YAG source rod	129.6
3	2at% Yb:YAG SCF	111.6
4	2at% Yb:YAG source rod	126.0

Fig. 8 Characteristic Laue back-reflection patterns of Yb:YAG (a) 1at% Yb:YAG; (b) 2at%Yb:YAG

Fig. 9 Distribution of Yb3+ ions along the axial direction in grown SCFs

Table 2 YAG SCF grown by LHPG method

Type	Diameter /mm	Length /mm	Uniformity	Concentration distribution	Ref.
Yb:YAG	0.6	150	<2%	√	[16]
Yb:YAG	0.8	Centimeters	-	-	[15]
Yb:Ho:YAG	0.45	124	-	-	[8]
Tm/Yb:YAG	0.8	40	-	√	[19]
Ho:YAG	0.32	280	-	-	[20]
Ho:YAG	0.24	118	-	-	[21]
Nd:YAG	0.6-1.2	300	-	-	[22]
Nd:YAG	1	42	-	-	[23]
Nd:YAG	0.6	25	-	-	[24]

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激光加热基座法生长高质量Yb³⁺掺杂Y₃A_l5O₁₂单晶光纤

Growth of High-quality Yb³⁺-doped Y₃Al₅O₁₂ Single Crystal Fiber by Laser Heated Pedestal Growth Method

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