基于晶体光波导的长寿命光存储  

Long⁃term optical memory based on crystal waveguide

作　　者：郑亮 刘超 周宗权[1,2] 李传锋 ZHENG Liang;LIU Chao;ZHOU Zongquan;LI Chuanfeng(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory,Hefei 230088,China)

机构地区：[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

出　　处：《量子电子学报》2025年第2期246-254,共9页Chinese Journal of Quantum Electronics

基　　金：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)。

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20μm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。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 20μm 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.

关 键 词：量子光学 光存储 集成光学 光波导 

分 类 号：O436[机械工程—光学工程]