铌酸锂
铒
材料科学
兴奋剂
激光器
离子
吸收(声学)
光子学
放大器
光放大器
光电子学
锂(药物)
光学
饱和(图论)
分析化学(期刊)
化学
物理
CMOS芯片
医学
数学
有机化学
组合数学
色谱法
复合材料
内分泌学
作者
Zhongzheng Zhang,Zhaojie Wu,Yuqi Zhang,Shiguo Liu,Hongde Liu,Dahuai Zheng,Yongfa Kong,Jingjun Xu
标识
DOI:10.1021/acs.cgd.4c00861
摘要
Photonics on a lithium-niobate-on-insulator (LNOI) has emerged as one of the most attractive fields within integrated optics. Recently, the lasers and amplifiers on LNOI have made a series of breakthroughs and important progress; however, their output efficiencies are still at a low level. In this paper, a series of erbium-doped lithium niobate (Er:LN) crystals were grown from the congruent melts with different concentrations ranging from 0.1 to 4.0 mol % by the Czochralski method. The absorption and emission intensities became stronger with the increase of erbium ion concentration and approached saturation when it is up to 2.0 mol %. Judd–Ofelt and McCumber theories were carried out to discuss the optical characteristics of erbium ions in Er:LN crystals, providing a basis for evaluating the performance of Er:LN devices. Besides, the UV absorption edges and the OH– absorption bands showed that there is a threshold around 2.0–2.65 mol % of erbium ions in Er:LN crystals, indicating a change of defect structures. It was concluded that the optimal doping concentration of erbium ions in Er:LN crystals is about 2.0 mol %, which provides significant guidance for the development of highly efficient LNOI lasers and amplifiers.
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