基于晶体光波导的长寿命光存储

doi:10.3969/j.issn.1007-5461.2025.02.010

量子电子学报 ›› 2025, Vol. 42 ›› Issue (2): 246-259.doi: 10.3969/j.issn.1007-5461.2025.02.010

基于晶体光波导的长寿命光存储

郑亮 1, 刘超 1, 周宗权 1,2*, 李传锋 1,2*

1 中国科学技术大学, 中国科学院量子信息重点实验室, 安徽合肥 230026; 2 合肥国家实验室, 安徽合肥 230088

收稿日期:2023-12-06 修回日期:2024-02-27 出版日期:2025-03-28 发布日期:2025-03-28
通讯作者: zq_zhou@ustc.edu.cn; cfli@ustc.edu.cn E-mail: zq_zhou@ustc.edu.cn; cfli@ustc.edu.cn
作者简介:郑亮 ( 1997 - ), 浙江绍兴人, 研究生, 主要从事稀土离子掺杂晶体有关的微纳光学结构方面的研究。E-mail: zl7991@mail.ustc.edu.cn
基金资助:
国家重点研发计划项目 (2017YFA0304100), 科技创新 2030—"量子通信与量子计算机"重大项目 (2021ZD0301200), 国家自然科学基金 (12222411, 11821404)

Long⁃term optical memory based on crystal waveguide

ZHENG Liang 1 , LIU Chao 1 , ZHOU Zongquan 1,2*, LI Chuanfeng 1,2*

1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China; 2 Hefei National Laboratory, Hefei 230088, China

Received:2023-12-06 Revised:2024-02-27 Published:2025-03-28 Online:2025-03-28

摘要/Abstract

摘要： 基于稀土离子掺杂晶体中的光波导, 研发了一种可集成的长寿命光存储器。该存储器采用飞秒激光微加工技术制作, 具有20 μm 截面尺度与5 dB的总插损。在该存储器中进行了长寿命光存储演示, 其存储效率衰减曲线呈现多指数衰减模式, 衰减模式的特征时间常数分别为4.9 ± 0.1 h与14.2 ± 0.8 h。该存储器在1.4 s存储时间下的存储效率为8.1%, 最长存储时间达到24 h, 对应存储效率约为0.6%。这种长寿命的晶体波导型光存储器具有向二维集成阵列发展的潜力, 有望在集成光学信息处理领域得到应用。

关键词: 量子光学, 光存储, 集成光学, 光波导

Abstract: An integrated optical memory with a long storage lifetime based on a waveguide fabricated in a rare-earth-ion-doped crystal is developed in this work by utilizing femtosecond-laser-micromachining. This optical memory features a cross-section with 20 μm diameter and an insertion loss of 5 dB. A demonstration of long-life optical storage in the memory shows that the storage efficiency decay of the memory exhibits a multi-exponential pattern, with characteristic time constants of 4.9 ± 0.1 h and 14.2 ± 0.8 h. This optical memory has a storage efficiency of 8.1% at a storage time of 1.4 s, and a storage efficiency of 0.6% is achieved at maximum storage time of 24 hours. Such long-lived crystal waveguide based memory is potential to be extended to a 2-dimensional integration array, and is expected to be applied in integrated optical information processing.

Key words: quantum optics, optical memory, integrated optics, optical waveguide

中图分类号:

O436

郑亮 , 刘超 , 周宗权 , 李传锋 , . 基于晶体光波导的长寿命光存储[J]. 量子电子学报, 2025, 42(2): 246-259.

ZHENG Liang , LIU Chao , ZHOU Zongquan , LI Chuanfeng , . Long⁃term optical memory based on crystal waveguide[J]. Chinese Journal of Quantum Electronics, 2025, 42(2): 246-259.

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基于晶体光波导的长寿命光存储

Long⁃term optical memory based on crystal waveguide

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