大尺寸氟化铽锂晶体生长与性能

人工晶体学报 ›› 2023, Vol. 52 ›› Issue (7): 1352-1356.

• 其他激光与非线性光学晶体 • 上一篇下一篇

大尺寸氟化铽锂晶体生长与性能

李兴旺^1,2, 杨宇¹, 芦佳¹, 董畅¹, 王永国^1,2, 徐学珍^1,2

1.北京雷生强式科技有限责任公司,北京 100015;
2.固体激光技术重点实验室,北京 100015

收稿日期:2023-03-21 出版日期:2023-07-15 发布日期:2023-08-16
作者简介:李兴旺(1979—),男,内蒙古自治区人,博士,高级工程师。E-mail:lixingwang@oet.com.cn

Growth and Properties of Large Size Lithium Terbium Fluoride Crystal

LI Xingwang^1,2, YANG Yu¹, LU Jia¹, DONG Chang¹, WANG Yongguo^1,2, XU Xuezhen^1,2

1. Beijing Opto-Electronics Technology Co., Ltd., Beijing 100015, China;
2. Science and Technology on Solid-State Lasers Laboratory, Beijing 100015, China

Received:2023-03-21 Online:2023-07-15 Published:2023-08-16

摘要/Abstract

摘要： 氟化铽锂(LTF)晶体具有大的维尔德常数、低的吸收系数,是一种性能优良的磁光晶体材料,适合用作高功率、大能量激光系统用磁光器件的磁光材料。本文以高纯TbF₃和LiF为原料,采用电阻加热提拉法,在Ar气和CF₄混合气体保护下,成功生长出了直径达2英寸的大尺寸LTF晶体。该晶坯外观完整,具有良好的光学均匀性和较低的残留应力,He-Ne激光照射下无肉眼可见散射颗粒。该晶体还加工出了直径为10 mm的LTF晶体元件,测试其单程损耗系数、消光比、透过波前畸变和弱吸收系数等参数,结果表明生长的LTF晶体具有良好的光学质量,其维尔德常数约为市售商用TGG晶体的98%。

关键词: 氟化铽锂, 磁光晶体, 提拉法, 吸收系数, 光学性能, 磁光性能, 大尺寸

Abstract: Lithium terbium fluoride (LTF) crystal is a good kind of magneto-optical material with high Verdet constant and low absorption coefficient, which is suitable to be used in magnetic-optical devices for high-power and large energy laser systems. In this paper, large size and high optical quality LTF crystal with a diameter of 2 inch was prepared by resistance heating Czochralski method, under the conditions of a protective atmosphere mixed with Ar and CF₄. During this process, high-purity TbF₃ and LiF were adopted as the raw materials. The optical properties of the LTF crystal were analyzed in detail. This crystal boule exhibits a complete appearance, good optical uniformity, and low residual stress, with no visible scattering particles under He-Ne laser irradiation. The LTF crystal elements with a diameter of 10 mm were processed from this boule. The parameters of the crystal elements such as the single-pass loss coefficient, extinction ratio, wavefront distortion, and weak absorption coefficient were tested. The results show that the grown LTF crystal have good optical quality. The magneto-optical performance of the LTF crystal was also researched, and its Verdet constant is about 98% of that of the commercial TGG crystals.

Key words: LTF, magneto-optic crystal, Czochralski method, absorption coefficient, optical property, magneto-optical property, large size

中图分类号:

李兴旺, 杨宇, 芦佳, 董畅, 王永国, 徐学珍. 大尺寸氟化铽锂晶体生长与性能[J]. 人工晶体学报, 2023, 52(7): 1352-1356.

LI Xingwang, YANG Yu, LU Jia, DONG Chang, WANG Yongguo, XU Xuezhen. Growth and Properties of Large Size Lithium Terbium Fluoride Crystal[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(7): 1352-1356.

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大尺寸氟化铽锂晶体生长与性能

Growth and Properties of Large Size Lithium Terbium Fluoride Crystal

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