面向磁光应用的CeF3晶体生长与性能表征

doi:10.15541/jim20220592

无机材料学报 ›› 2023, Vol. 38 ›› Issue (3): 296-302.DOI: 10.15541/jim20220592

面向磁光应用的CeF₃晶体生长与性能表征

吴振¹^,²^,³(), 李慧芳³^,⁴, 张中晗³, 张振³, 李阳⁵, 蓝江河⁵, 苏良碧¹^,²^,³, 武安华¹^,²^,³()

1.中国科学技术大学稀土学院, 合肥 230026
2.中国科学院赣江创新研究院, 赣州 341119
3.中国科学院上海硅酸盐研究所, 上海 201899
4.上海理工大学材料科学与工程学院, 上海 200093
5.中国电子科技集团公司第九研究所, 绵阳 621000

收稿日期:2022-10-10 修回日期:2022-11-17 出版日期:2022-12-30 网络出版日期:2022-12-30
通讯作者: 武安华, 研究员. E-mail: wuanhua@mail.sic.ac.cn
作者简介:吴振(1997-), 男, 硕士研究生. E-mail: WZ2422079678@163.com
基金资助:
国家重点研发计划(2021YFB360150);上海市科技委“科技创新行动计划”国际科技合作项目(中俄)(21520711300);中国电子科技集团公司第九研究所对外开放项目(2022SK-013);国家自然科学基金(52272014)

Growth and Characterization of CeF₃ Crystals for Magneto-optical Application

WU Zhen¹^,²^,³(), LI Huifang³^,⁴, ZHANG Zhonghan³, ZHANG Zhen³, LI Yang⁵, LAN Jianghe⁵, SU Liangbi¹^,²^,³, WU Anhua¹^,²^,³()

1. School of Rare Earths, University of Science and Technology of China, Hefei 230026, China
2. Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341119, China
3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
4. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
5. The Ninth Research Institute of China Electronics Technology Group Corporation, Mianyang 621000, China

Received:2022-10-10 Revised:2022-11-17 Published:2022-12-30 Online:2022-12-30
Contact: WU Anhua, professor. E-mail: wuanhua@mail.sic.ac.cn
About author:WU Zhen (1997-), male, Master candidate. E-mail: WZ2422079678@163.com
Supported by:
The National Key Research and Development Program of China(2021YFB360150);Shanghai Science and Technology Commission “Science and Technology Innovation Action Plan” International Science and Technology Cooperation Project (China and Russia)(21520711300);Opening Project of the Ninth Research Institute of China Electronics Technology Group Corporation(2022SK-013);National Natural Science Foundation of China(52272014)

摘要/Abstract

摘要：

随着高功率激光和光通信技术的迅速发展, 如何消除光学系统内部产生的反射噪声是一个至关重要的问题。磁光隔离器是依据法拉第效应设计而成的磁有源器件, 能够有效隔离大部分反射光以保证光学系统稳定工作, 而法拉第磁光材料作为磁光隔离器的核心部件, 其研究和应用推动了磁光隔离器的更新与发展。CeF₃晶体具有高透过率、宽透过区间和高Verdet常数等优点, 近年来获得了广泛关注, 但是其传统生长方法存在成本高、周期长等缺点。本研究通过坩埚下降生长技术, 优化温场结构和生长工艺, 采用多孔坩埚成功获得多根CeF₃晶体。与商用TGG(Tb₃Ga₅O₁₂)晶体相比, CeF₃晶体的透过率得到明显提高, 最高达到92%, 并且在近红外波段两者的Verdet常数相当。CeF₃晶体的比热较高, 表明晶体拥有较强的抗热冲击能力和较高的抗激光损伤能力。本研究使用多孔坩埚技术生长CeF₃晶体, 实现了规模化和低成本生产; 生长的CeF₃晶体物理性能优良, 具有应用于近红外波段磁光隔离器的巨大潜力。

关键词: CeF₃, 磁光晶体, 晶体生长, 多孔坩埚技术

Abstract:

With the rapid development of high power laser and optical communication technology, how to eliminate the reflected noise generated inside the optical system is a crucial challenge. The magneto-optical isolators are magnetically active devices designed according to the Faraday effect, which can effectively isolate most of the reflected light to ensure the stable operation of the optical system. As the core component of the magneto-optical isolator, research and application of Faraday magneto-optical materials are promoting the update and development of the magneto-optical isolators. CeF₃ crystals have the advantages of high transmittance, wide transmission range and high Verdet constant, and have received widespread attention in recent years for the excellent magneto-optical property. But its traditional growth methods have some disadvantages such as high cost and long cycle. In this study, multiple CeF₃ crystals were successfully obtained by the porous crucible technology through optimizing the temperature field structure and process of Bridgman growth technology. Compared with commercial TGG(Tb₃Ga₅O₁₂) crystals, CeF₃ crystals have a significantly high transmittance up to 92%, and a comparable Verdet constant in the near-infrared wavelength, and the thermal performance test results show that CeF₃ crystals have high specific heat, indicating a strong thermal shock resistance and a high laser damage resistance. Therefore, the porous crucible technology is a large-scale and low-cost production method, which can be used to grow CeF₃ crystals achieving with excellent physical properties, exhibits great potential to develop magneto-optical isolators in the near-infrared band.

Key words: CeF₃, magneto-optical crystal, crystal growth, porous crucible technology

中图分类号:

O734

吴振, 李慧芳, 张中晗, 张振, 李阳, 蓝江河, 苏良碧, 武安华. 面向磁光应用的CeF₃晶体生长与性能表征[J]. 无机材料学报, 2023, 38(3): 296-302.

WU Zhen, LI Huifang, ZHANG Zhonghan, ZHANG Zhen, LI Yang, LAN Jianghe, SU Liangbi, WU Anhua. Growth and Characterization of CeF₃ Crystals for Magneto-optical Application[J]. Journal of Inorganic Materials, 2023, 38(3): 296-302.

图/表 9

图1 多孔坩埚结构示意图

Fig. 1 Schematic diagrams of the porous crucible structure (a) Side view; (b) Vertical view

图2 原生态CeF3晶体的开裂形貌

Fig. 2 As-grown cracked samples of CeF3 crystals

图3 (a, b)原生态CeF3晶体和(c)加工样品的照片

Fig. 3 Pictures of (a, b) As-grown CeF3 crystal and (c) the polished sample

图4 CeF3晶体粉末XRD谱图

Fig. 4 XRD patterns of CeF3 crystal powder

图5 CeF3晶体和TGG晶体透过光谱图

Fig. 5 Transmission spectra of CeF3 crystal and TGG crystal Colorful figure is available on website

图6 (a)实验原理示意图和(b)基于CeF3晶体的磁光隔离器原型器件的照片

Fig. 6 (a) Schematic diagram of experimental principle and (b) picture of magneto-optical isolator based on CeF3 crystal

表1 螺线管线圈电流与磁场强度的对应关系

Table 1 Correspondence between solenoid coil current and magnetic field intensity

I/A	0.5	1.0	1.5	2.0	2.5
H/mT	8.2	16.4	24.6	32.8	41.0

图7 1064 nm波长下, CeF3晶体法拉第旋转角随外加磁场强度的变化关系

Fig. 7 Faraday rotation angle of CeF3 crystal at 1064 nm wavelength as a function of the magnetic field intensity

图8 晶体的热学性能随温度的变化

Fig. 8 Thermal properties of crystals as a function of temperature (a) Specific heat; (b) Thermal diffusivity; (c) Thermal conductivity; (d) Thermal expansion

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面向磁光应用的CeF₃晶体生长与性能表征

Growth and Characterization of CeF₃ Crystals for Magneto-optical Application

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