作者单位
摘要
1 国网江苏省电力有限公司 苏州供电分公司,江苏 苏州 215004
2 国网江苏省电力有限公司,南京 210008
3 中国能源建设集团江苏省电力设计院有限公司,南京 211102
【目的】

围绕建设具有中国特色国际领先的能源互联网企业战略目标,按照促进先进信息通信技术与先进能源技术深度融合应用,着力提升电力通信网对电网安全运行支撑保障能力的总体要求,苏州电力自2019年起规划建设220 kV保护专用通信网。目前苏州地区220 kV继电保护通道存在抢修时间较长、通信柜位资源占用较多、保护业务和通信业务混合组网等问题,对电网安全运行构成隐患。

【方法】

文章分析了苏州地区220 kV继电保护通道现状及存在的问题,结合苏州市光通信网络实际情况,提出了采用2 Mbit/s光接口直连保护设备的方式承载继电保护B口通道,并细化了电源改造方案、组网模式、保护业务承载模式和网络管理承载模式。

【结果】

苏州电力通过定制与继电保护业务匹配的小型专用通信传输设备,利用光纤直达通道和保护专用通信网复用通道的各自特点,建设了一张覆盖所有具有220 kV出线站点的保护专用通信网。

【结论】

保护专用通信网接入集中传输设备的网管监控继电保护通道,实现了继电保护通道的可观性和可测性,具有故障快速定位、故障隔离和通道迂回等优势,全面提升了继电保护通道的可靠性、独立性、灵活性和运维便利性,取得了显著的应用成效及创新成果,同时,为保护通道“3路由”应用做出了有益的探索。

保护专用通信网 继电保护通道 2 Mbit/s光接口 protect private communication network relay protection channel 2 Mbit/s optical port 
光通信研究
2023, 49(6): 51
Author Affiliations
Abstract
1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
2 CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
3 Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
Modulation of a vector light field has played an important role in the research of nanophotonics. However, it is still a great challenge to accurately measure the three-dimensional vector distribution at nanoscale. Here, based on the interaction between the light field and atomic-sized nitrogen-vacancy (NV) color center in diamonds, we demonstrate an efficient method for vectorial mapping of the light-field distribution at nanoscale. Single NV centers with different but well-defined symmetry axes are selected and then interact with the same tightly focused light field. The excitation of a single NV center is related to the angle between the NV center axis and the polarization of the light field. Then the fluorescence patterns of different NV centers provide the information on the vectorial light field distribution. Subsequently analyzing the fluorescence patterns with the help of a deep neural network, the intensity and phase of the light-field vectorial components are fully reconstructed with nanometer resolution. The experimental results are in agreement with theoretical calculations. It demonstrates that our method can help to study light–matter interaction at nanoscale and extend the application of vector light fields in research on nanophotonics.
light-field measurement nitrogen-vacancy center tightly focused light field 
Chinese Optics Letters
2023, 21(7): 071202
作者单位
摘要
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
金刚石中的氮-空位(NV)色心在室温下具有稳定的荧光发射,超长的电子自旋相干时间以及许多优良的光学性质,可以对电磁场,温度进行高灵敏度表征。光纤传感技术近几年来发展迅速,在电力、化工、交通、医疗、环保及**等领域得到广泛应用。光纤体系由于其集成度、实用性高以及操作便捷性,且具有优良的传输光能力,损耗较低,可与NV色心结合,形成一种高集成化、高灵敏度的便捷性传感系统,未来将会作为传感器件投入到许多领域的应用中,例如对生物细胞、材料温度、磁场等物理量的高灵敏度测量。本综述主要介绍NV色心体系的光纤量子传感技术的工作原理、实现方式以及在相关领域的应用。
氮-空位色心 光纤 量子传感 nitrogen-vacancy optical fiber quantum sensing 
激光与光电子学进展
2023, 60(11): 1106001
Haobin Lin 1,2,3Ce Feng 1,2,3Yang Dong 1,2,3Wang Jiang 1,2,3[ ... ]Fangwen Sun 1,2,3
Author Affiliations
Abstract
1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
2 CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
3 Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
4 National Key Laboratory of ASIC, Hebei Semiconductor Research Institute, Shijiazhuang 050051, China
Nitrogen-vacancy color centers can perform highly sensitive and spatially resolved quantum measurements of physical quantities such as magnetic field, temperature, and pressure. Meanwhile, sensing so many variables at the same time often introduces additional noise, causing a reduced accuracy. Here, a dual-microwave time-division multiplexing protocol is used in conjunction with a lock-in amplifier in order to decouple temperature from the magnetic field and vice versa. In this protocol, dual-frequency driving and frequency modulation are used to measure the magnetic and temperature field simultaneously in real time. The sensitivity of our system is about 3.4 nT/Hz and 1.3 mK/Hz, respectively. Our detection protocol not only enables multifunctional quantum sensing, but also extends more practical applications.
quantum sensing temperature measurement magnetic field measurement 
Chinese Optics Letters
2023, 21(1): 011201
Author Affiliations
Abstract
1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
2 CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
3 Hefei National Laboratory for Physical Science at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China
The nitrogen vacancy (NV) center in diamond has been well applied in quantum sensing of electromagnetic field and temperature, where the sensitivity can be enhanced by the number of NV centers. Here, we used electron beam irradiation to increase the generation rate of NV centers by nearly 22 times. We systematically studied the optical and electronic properties of the NV center as a function of an electron irradiation dose, where the detection sensitivity of magnetic fields was improved. With such samples with dense NV centers, a sub-pico-Tesla sensitivity in magnetic fields detection can be achieved with optimal controls and detections.
quantum sensing nitrogen vacancy center generation electron irradiation 
Chinese Optics Letters
2020, 18(8): 080201
作者单位
摘要
中国科学技术大学量子信息重点实验室, 安徽 合肥 230026
光学显微镜的出现为细胞等微观结构的研究打开了新的大门,然而衍射极限的限制使得更加精细的结构难以探测。近年来,一些充满创造性的方法突破了衍射极限,达到纳米级分辨率。氮-空位(NV)色心是金刚石中一种常见的发光缺陷,由于其具有明亮而稳定的发光性质和较长的电子自旋相干时间而被广泛应用于量子计算与量子测量中;同时,NV色心在超分辨成像技术中也发挥着巨大作用,通过与各种超分辨成像显微镜的结合,实现了对NV色心的纳米级分辨率成像,而且进一步实现高空间分辨率的量子传感。本文简单介绍了NV色心的结构与性质,以及各类成像技术的基本原理;对NV色心与超分辨成像结合的各项技术实验成果进行了归纳与比较,并对其应用进行了总结与展望。
成像系统 超分辨成像 衍射极限 NV色心 荧光显微镜 imaging systems super-resolution microscopy diffraction limit NV center fluorescence microscopy 
激光与光电子学进展
2017, 54(3): 030003
Author Affiliations
Abstract
1 Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
2 Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
The measurement of the second-order degree of coherence [g(2)(τ)] is one of the important methods used to study the dynamical evolution of photon-matter interaction systems. Here, we use a nitrogen-vacancy center in a diamond to compare the measurement of g(2)(τ) with two methods. One is the prototype measurement process with a tunable delay. The other is a start-stop process based on the time-to-amplitude conversion (TAC) and multichannel analyzer (MCA) system, which is usually applied to achieve efficient measurements. The divergence in the measurement results is observed when the delay time is comparable with the mean interval time between two neighboring detected photons. Moreover, a correction function is presented to correct the results from the TAC-MCA system to the genuine g(2)(τ). Such a correction method will provide a way to study the dynamics in photonic systems for quantum information techniques.
160.2220 Defect-center materials 270.5290 Photon statistics 
Chinese Optics Letters
2016, 14(7): 072701
李雪 1,2,*高伟清 3徐强 4胡继刚 4[ ... ]余有龙 1,5
作者单位
摘要
1 合肥工业大学 电子科学与应用物理学院
2 仪器科学与光电工程学院 合肥 230009
3 合肥工业大学 电子科学与应用物理学院,合肥 230009
4 合肥工业大学 电子科学与应用物理学院,合肥 230009
5 仪器科学与光电工程学院 合肥 230009:
基于有限元算法建立用于刻写中红外光纤布喇格光栅(Fiber Bragg Grating, FBG)的相位模板物理模型,对相位模板的衍射光场进行模拟分析。在模拟过程中,采用平面波和球面波两种不同光源。采用平面波作为入射光时,通过改变平面波的入射角度和相位模板光栅的刻槽深度分析Talbot 衍射图样的变化。采用球面波作为入射光时,通过改变光源与相位模板的距离分析衍射图样的变化。结果表明,当平面波以任意角度斜入射时,沿与入射光相同方向形成Talbot 衍射图样。当改变相位模板刻槽深度时,Talbot 衍射图样的形状和能量分布均发生变化:随着刻槽深度的增加,衍射能量最大值逐渐变大;当刻槽超过一定深度时,能量最大值开始减小,同时Talbot 图像向均匀条纹演变。当球面波入射到相位模板时,Talbot 衍射图样沿球面波传播方向分布。随着球面波波源逐渐靠近相位模板,能量最大值逐渐升高;当超过一定距离时,能量最大值开始下降。
光纤布喇格光栅 相位模板 Talbot 衍射图样 有限元算法 fiber Bragg grating phase mask Talbot diffraction pattern finite element method 
光电工程
2016, 43(12): 13
作者单位
摘要
合肥工业大学电子科学与应用物理学院, 安徽 合肥 230009
利用飞秒激光器具有超短脉冲和超高峰值功率的特性,对非金属可降解血管支架的切割加工进行了研究,实验证明利用飞秒激光切割非金属支架可以达到无热损伤的精密加工的目的。通过正交实验得到加工非金属血管支架各参数之间的关系,求出最佳加工参数:激光脉冲频率10 kHz,脉冲宽度412 fs,激光功率1.6 W,辅助Ar气压0.8 MPa,切割速度1.2 mm/s,达到对非金属材料聚乳酸切线精细平直、切边光滑,表面无碳化、无残渣残留的加工效果,加工出了相应的非金属支架样品。
光学制造 飞秒激光 加工工艺 非金属支架 激光切割 聚乳酸 optical fabrication femtosecond laser processing technology nonmetallic stent laser cutting polylactic acid 
激光与光电子学进展
2013, 50(9): 091403

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