2023年是北京串列加速器核物理国家实验室建成35周年,加速器与核反应堆是研究核科学的两大利器,1988年,串列实验室正式成立,作为我国核物理研究的重要基地之一,持续发挥核基础创新引领作用,完成了14万小时的稳定运行,开展了核物理基础、核数据测量、核物理应用和交叉学科的研究工作,产出了一系列国际水平和满足国家重大需求的科技成果,培养了一批杰出人才,为我国核物理研究和核科技战略的持续发展提供了有力支撑。本文对串列实验室35年的发展做一综述。

Author Affiliations
Abstract
1 Department of Electronic Engineering, College of Information Science and Technology, Jinan Universityhttps://ror.org/02xe5ns62, Guangzhou 510632, China
2 International Institute for Innovative Design and Intelligent Manufacturing, Tianjin University, Shaoxing 312000, China
3 Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems, Sun Yat-sen University, Guangzhou 510275, China
4 Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
5 e-mail: wanlei@jnu.edu.cn
6 e-mail: lzhh88@sysu.edu.cn
Integrated optomechanical crystal (OMC) cavities provide a vital device prototype for highly efficient microwave to optical conversion in quantum information processing. In this work, we propose a novel heterogeneous OMC cavity consisting of a thin-film lithium niobate (TFLN) slab and chalcogenide (ChG) photonic crystal nanobeam coupled by a wavelength-scale mechanical waveguide. The optomechanical coupling rate of the heterogeneous OMC cavity is optimized up to 340 kHz at 1.1197 GHz. Combined with phononic band and power decomposition, 17.38% energy from the loaded RF power is converted into dominant fundamental horizontal shear mode (SH0) in the narrow LN mechanical waveguide. Based on this fraction, as a result, 3.51% power relative to the loaded RF energy is scattered into the fundamental longitudinal mode (L0) facing the TFLN-ChG heterogeneous waveguide. The acoustic breathing mode of the heterogeneous OMC is successfully excited under the driving of the propagating L0 mode in the heterogeneous waveguide, demonstrating the great potentials of the heterogeneous piezo-optomechanical transducer in high-performance photon–phonon interaction fields.
Photonics Research
2023, 11(9): 1509
1 中国人民解放军 32181部队,陕西 西安 710032
2 西安应用光学研究所,陕西 西安 710065
3 河北工业大学 人工智能与数据科学学院,天津 300131
4 郑州科技学院,河南 郑州 450064
基于CMOS器件的低照度夜视装备隐蔽性好,成本较红外热像装备低,是拓展人眼低照度条件下视觉感知的重要手段,在**和民用领域都有广泛应用。为满足夜间低照度天候条件下装备维修保障需求,设计了一款大视场低照度夜视头戴目镜光学系统。通过选择合适的光学玻璃材料,在可见/近红外波段均有很好的光谱响应。设计完成的大相对孔径目镜视场角为74.46°,焦距为46 mm,F数为1.2,畸变小于?7.14 %,系统总长小于80 mm,且镜头总质量小于100 g。该目镜在486 nm~950 nm光谱范围内能够满足夜间无照明条件下的维修、训练和场景观察,为低照度夜视头戴系统光学模组研制提供了新的技术手段。
光学系统 夜视头戴 目镜设计 大相对孔径 optical system night vision headwear eyepiece design large relative aperture
中国激光
2023, 50(13): 1306002
1 西北工业大学 航空学院,陕西 西安 710072
2 西北核技术研究所 激光与物质相互作用国家重点实验室,陕西 西安 710024
为了研究以激光为热源开展材料高温力学性能测试的可行性,建立理论模型与数值模型,分析了材料在双面均匀激光光斑加热下的表面及内部温升。结果表明,理想情况下采用均匀化激光双面辐照的加热方式可以在试件加热区域内形成较均匀的温度场。为验证上述结论,建立了光斑匀化度达92%的激光双面辐照热力耦合测试试验平台,并基于相关测试方法获取了传统加热方式难以快速加热的CFRP层合板高温拉伸强度。结果表明,试件在激光加热中心测试区域(10 mm×10 mm)内的温度均匀性良好。试件在均匀化激光双面辐照下可被快速加热至923 ℃,测试区域内的最大温度波动为6.8%。文中提出的基于均匀化激光双面辐照的热力耦合测试方法相比传统测试方法具有通用性好、温升率高、测试温度高、测试效率高等一系列的优点。该研究可为进一步研制通用型材料/结构高温升率、高温力学性能试验系统提供关键技术支撑。
双面辐照 均匀激光 高温 拉伸强度 CFRP double-sided irradiation uniform laser high temperature tensile strength CFRP 红外与激光工程
2023, 52(1): 20220329
Author Affiliations
Abstract
1 Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou 510632, China
2 Fiberhome Telecommunication Technologies Co., Ltd., Wuhan 430074, China
3 Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems and School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
In order to increase the number of amplified azimuthal modes in Yb-doped fiber (YDF), a multiple azimuthal modes amplifier based on a ring-core Yb-doped fiber (RC-YDF) was proposed and demonstrated. A home-made RC-YDF which can support 6 azimuthal mode groups was employed to amplify the signal mode at 1 064 nm, using a core pump scheme. The amplification characteristics of 5 high-order azimuthal linear polarization (HA-LP) mode groups (LP11, LP21, LP31, LP41, LP51) were studied comprehensively. A more than 8 dB gain is obtained for each signal mode with 5 dBm input power, and the associated differential modal gain between all modes is less than 1 dB. The intensity profiles of all modes are stable and well preserved during the process of amplification.
光电子快报(英文版)
2022, 18(4): 222
西北核技术研究所 激光与物质相互作用国家重点实验室,陕西 西安 710024
当激光辐照玻璃钢烧蚀碳化至一定程度时,产生的树脂碳产物对微波传输产生衰减作用。针对该现象,开展了数值建模研究,将激光辐照-微波传输衰减效应分解为激光辐照、材料热响应、提取模型表征量、微波传输衰减分析等过程。通过玻璃钢材料的激光耦合特性和表面温度测试,对建立的玻璃钢层合板激光辐照温度场计算模型进行了验证;通过材料体温度分布的时间演进分析,提取了网格单元温度超过阈值温度的持续时间加权和St, Tc、网格单元温度超过阈值温度的持续时间与温度乘积的加权和STt, Tc两个模型表征量,采用单个实验数据标定系数、整体数据点匹配分析方法,对微波传输衰减实验与数值模拟结果进行了分析。分析结果表明,St, Tc比STt, Tc更适于表征玻璃钢烧蚀碳化致微波传输衰减效应,温度阈值为873 ℃时计算结果与实验结果最匹配,其R2为0.9956。这说明,通过计算激光辐照玻璃钢温度响应并提取微波传输衰减效应表征量St, Tc,可实现对玻璃钢激光烧蚀碳化致微波传输衰减效应的模拟和预测。
玻璃钢 碳化 微波传输衰减 数值模拟 GFRP carbonization microwave transmission decay numerical simulation 红外与激光工程
2021, 50(12): 20210137