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On-chip generation of Bessel–Gaussian beam via concentrically distributed grating arrays for long-range sensing

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Light(Science & Applications) 2023年第5期12卷 817-825页

作者： Zihao Zhi Quanxin Na Qijie Xie Baisong Chen Yingzhi Li Xiaobin Liu Xuetong Li Lijun Wang guoqiang lo Junfeng Song State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China Peng Cheng Laboratory Shenzhen 518000China State Key Laboratory of Luminescence and Application Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Advance Micro Foundry Pte.Ltd. 11 Science Park RoadScience Park II 117685Singapore

Bessel beam featured with self-healing is essential to the optical sensing applications in the obstacle scattering *** on-chip generation of the Bessel beam outperforms the conventional structure by small size,robustness,and alignment-free ***,the maximum propagation distance(Z_(max))provided by the existing approaches cannot support long-range sensing,and thus,it restricts its potential *** this work,we propose an integrated silicon photonic chip with unique structures featured with concentrically distributed grating arrays to generate the Bessel-Gaussian beam with a long propagation *** spot with the Bessel function profile is measured at 10.24m without optical lenses,and the photonic chip’s operation wavelength can be continuously performed from 1500 to 1630 *** demonstrate the functionality of the generated Bessel-Gaussian beam,we also experimentally measure the rotation speeds of a spinning object via the rotational Doppler Effect and the distance through the phase laser ranging *** maximum error of the rotation speed in this experiment is measured to be 0.05%,indicating the minimum error in the current *** the compact size,low cost,and mass production potential of the integrated process,our approach is promising to readily enable the Bessel-Gaussian beam in widespread optical communication and micro-manipulation applications.

关键词： scattering Bessel beam

Wide-steering-angle high-resolution optical phased array

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Photonics Research 2021年第12期9卷 2511-2518页

作者： YINGZHI LI BAISONG CHEN QUANXIN NA QIJIE XIE MIN TAO LANXUAN ZHANG ZIHAO ZHI YUXUAN LI XIAOBIN LIU XIANSHU LUO guoqiang lo FENGLI GAO XUEYAN LI JUNFENG SONG State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China Peng Cheng Laboratory Shenzhen 518000China Advance Micro Foundry Pte.Ltd. Singapore 117685Singapore

Optical phased array(OPA)technology is considered a promising solution for solid-state beam steering to supersede the traditional mechanical beam *** a key component of the LIDAR system for long-range detection,OPAs featuring a wide steering angle and high resolution without beam aliasing are highly ***,a wide steering range requires a waveguide pitch less than half of the wavelength,which is easily subjected to cross ***,high resolution requires a large aperture,and it is normally achieved by a high count number of waveguides,which complicates the control *** solve the mentioned issues,we design two high-performance 128-channel OPAs fabricated on a multilayered SiN-on-SOI *** to the nonuniform antenna pitch,only 128 waveguides are used to achieve a 4 mm wide ***,by virtue of innovative dual-level silicon nitride(Si_(3)N_(4))waveguide grating antennas,the fishbone antenna OPA achieves a 100°×19.4°field of view(FOV)with divergence of 0.021°×0.029°,and the chain antenna OPA realizes a 140°×19.23°FOV with divergence of 0.021°×0.1°.To our best knowledge,140°is the widest lateral steering range in two-dimensional OPA,and 0.029°is the smallest longitudinal ***,we embed the OPA into a frequency-modulated continuous-wave system to achieve 100 m distance *** reflected signal from 100 m distance is well detected with 26 dBm input transmitter power,which proves that OPA serves as a promising candidate for transceiving optical signal in a LIDAR system.

关键词： antenna waveguide resolution

Germanium-on-silicon avalanche photodiode for 1550 nm weak light signal detection at room temperature

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Chinese Optics Letters 2022年第6期20卷 47-51页

作者：李雨轩刘小斌李雪童张蓝萱陈柏松支自毫李雪妍张国威叶鹏黄冠中何德勇陈巍郜锋利郭鹏飞罗贤树卢国强宋俊峰 State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Advanced Micro Foundry Pte Ltd. Singapore 117685Singpore Peng Cheng Laboratory Shenzhen 518000China

To optimize the dark current characteristic and detection efficiency of the 1550 nm weak light signal at room temperature,this work proposes a Ge-on-Si avalanche photodiode[APD]in Geiger mode,which could operate at 300 *** lateral separate absorption charge multiplication APD shows a low breakdown voltage[V_(br)]in Geiger mode of-7.42 V and low dark current of 0.096 n A at unity gain voltage[V_(Gain)=1=-7.03 V].Combined with an RF amplifier module and counter,the detection system demonstrates a low dark count rate[DCR]of 1.1×10^(6) counts per second and high detection efficiencyηof 7.8%for 1550 nm weak coherent pulse detection at 300 *** APD reported in this work weakens the dependence of the weak optical signal recognition on the low environment temperature and makes single-chip integration of the single-photon level detection system possible.

关键词： avalanche photodiode optical detection optical interconnection

锡林郭勒羊肉真实性分析方法的建立及其适用性

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食品研究与开发 2024年第12期45卷 144-149页

作者：刘国强李春冬呼日牛慧敏徐伟良任雨婷郭梁锡林郭勒职业学院内蒙古自治区肉乳营养与安全工程研究中心内蒙古锡林浩特026000 锡林郭勒盟食品科学与检测实验中心(锡林郭勒盟农畜产品检验检测中心) 内蒙古锡林浩特026000

建立基于绵羊多胎(fecundity booroola,FecB)基因保守单核苷酸多态性(single nucleotide polymorphism,SNP)位点的TaqMan实时荧光聚合酶链式反应(polymerase chain reaction,PCR)分析方法,为锡林郭勒羊肉的真实性检测提供有益科学借鉴。利用锡林郭勒羊肉(乌珠穆沁羊和苏尼特羊)FecB基因的保守SNP位点(A)与高繁品种(小尾寒羊和湖羊)的对应基因位点(G)有明显差异,采集乌珠穆沁羊、苏尼特羊及小尾寒羊核心保种场种质资源对此基因位点进行大样本验证,建立锡林郭勒羊肉真实性判定模型,通过春节冷库抽样以及屠宰季现场采样对判定模型进行适用性研究。根据实时荧光扩增曲线检测结果判定FecB基因分型AA、AG和GG,建立以基因位点(G)的比率大于5%为判定界限,样本量不少于10为前提,来判断锡林郭勒羊群中是否含有高繁品种羊。春节冷库抽样验证20批冷库羊肉样品中有17批羊肉为锡林郭勒羊肉,3批羊肉样品存在高繁品种羊肉;屠宰季现场采样验证11批羊肉样品有9批为锡林郭勒羊肉,2批羊肉样品存在高繁品种羊肉。所建立的锡林郭勒羊肉真实性判定模型具有较好的判定能力,锡林郭勒本地市场中存在小尾寒羊和湖羊等高繁品种羊肉。

关键词：锡林郭勒羊肉真实性分析 FecB基因保守单核苷酸多态性位点高繁品种羊

柠檬酸与草酸不同施用浓度对葡萄产量、品质及养分吸收的影响

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果树学报 2023年第8期40卷 1606-1614页

作者：司鹏邵微徐国益于会丽谢宁杜国强河北农业大学园艺学院河北保定071000 中国农业科学院郑州果树研究所郑州450009 河南农业大学林学院郑州450002

【目的】探讨柠檬酸、草酸与氮磷钾肥配施对葡萄产量、果实品质、养分吸收的影响,并筛选出最适低分子质量有机酸与应用浓度,为阳光玫瑰葡萄提质增香专用肥料的研发提供参考。【方法】以施用氮磷钾肥为对照,设置5%与10%的柠檬酸(LC与HC)... 详细信息

【目的】探讨柠檬酸、草酸与氮磷钾肥配施对葡萄产量、果实品质、养分吸收的影响,并筛选出最适低分子质量有机酸与应用浓度,为阳光玫瑰葡萄提质增香专用肥料的研发提供参考。【方法】以施用氮磷钾肥为对照,设置5%与10%的柠檬酸(LC与HC)、草酸(lo与HO)与氮磷钾肥配施为处理,测定葡萄单果质量、产量、品质、养分及香气物质含量等指标。【结果】与对照相比,10%草酸处理葡萄产量显著升高36.18%,硬度显著升高11.94%。5%草酸处理下果实可溶性固形物含量与可溶性糖含量均为最高,分别较对照显著升高18.75%与69.21%;5%柠檬酸、草酸处理果实糖酸比显著升高,10%柠檬酸、草酸处理果实维生素C含量显著升高。草酸处理显著提高了葡萄果实感官肉质风味与综合评价指标。5%草酸处理较对照显著降低了叶片中NPK含量,而10%柠檬酸处理果实NPK含量均有所升高,其中P与K含量较对照显著升高60.42%与24.02%;施用柠檬酸与草酸均增加了葡萄果实香气物质含量,其中10%柠檬酸处理醛类物质含量最低,为61%。【结论】草酸与氮磷钾配施提升了阳光玫瑰葡萄产量与品质,其中以10%草酸效果最佳。

关键词：葡萄柠檬酸草酸果实品质产量

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Numerical Simulation of Single Microparticle Trajectory in an Electrodynamic Balance

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Chinese Journal of Chemical Engineering 2004年第3期12卷 444-447页

作者：冯昭华朱家骅杨雪峰夏素兰关国强 Davis E.J. School of Chemical Engineering Sichuan University Chengdu 610065 China Department of Chemical Engineering University of Washington Seattle Washington 98195-1750 USAy introducing Oseen's formula to describe the viscous drag force a more complete motion equation for a charged microparticle levitated in an electrodynamic balance (EDB) has been put forward and solved numerically by the classic Runge-Kutta method in this paper. The theoretical results have firstly demonstrated the existence of the particle oscillations and their characteristics especially of the springpoint oscillation at large amplitude. And through the comparisons of theoretical and experimental trajectories the adopted motion equation has proved to be able to rigorously describe the particle motion in non-Stokes region-the shape of trajectory and frequency characteristics are fairly consistent and the deviations of amplitude can usually be less than 10%.

By introducing Oseen's formula to describe the viscous drag force, a more complete motion equation for a charged microparticle levitated in an electrodynamic balance (EDB) has been put forward and solved numerically by the classic Runge-Kutta method in this paper. The theoretical results have firstly demonstrated the existence of the particle oscillations and their characteristics, especially of the springpoint oscillation at large amplitude .And through the comparisons of theoretical and experimental trajectories, the adopted motion equation has proved to be able to rigorously describe the particle motion in non-Stokes region--the shape of trajectory and frequencycharacteristics are fairlv consistent and the deviations of amnliturla c^n n^llzll^r ho lo~ th^n

关键词：电力学平衡数字模拟技术微粒振动 EDB

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局部最优化脉压滤波器设计及其应用

舰船电子工程 2023年第3期43卷 80-84页

作者：夏麾军郭国强黄怀玉南京电子技术研究所南京210039

针对强散射体回波的距离旁瓣遮蔽附近的微弱目标,导致对弱目标的检测概率降低的问题,提出了全局最优化脉压滤波器(PCGO)、局部最优化脉压滤波器(PClo)和基于PClo的综合信号处理方法(SPbPClo)。PCGO通过优化最大旁瓣最小化,获得脉压滤波... 详细信息

针对强散射体回波的距离旁瓣遮蔽附近的微弱目标,导致对弱目标的检测概率降低的问题,提出了全局最优化脉压滤波器(PCGO)、局部最优化脉压滤波器(PClo)和基于PClo的综合信号处理方法(SPbPClo)。PCGO通过优化最大旁瓣最小化,获得脉压滤波器系数;PClo通过设定期望区域,使得在期望区域内的脉压旁瓣最低,获得脉压滤波器系数,但在期望区域外,产生高旁瓣。SPbPClo处理方法结合PCGO和PClo方法,充分利用PClo期望区域内低旁瓣的优点,避免其他区域高旁瓣的缺点,完成了对弱目标的检测。最后以线性调频信号为例,采用蒙特卡洛仿真实验进行验证。实验结果表明,SPbPClo方法大大提高了强目标掩盖下的弱目标检测概率。

关键词：脉冲压缩旁瓣局部优化弱目标检测

基于位置指纹和6loWPAN的图书馆智能定位系统实现

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图书馆杂志 2018年第1期37卷 93-100页

作者：胡国强鞠建伟马来宏西北农林科技大学网络与教育技术中心西北农林科技大学图书馆

随着高校智慧化图书馆的建设和发展,室内定位技术在具有位置感知的智慧图书馆建设和管理中的作用日益重要。针对现有的基于WLAN的位置指纹定位技术在图书馆复杂环境下定位精度不高的问题,在考虑到高校接入IPv6网络的基础上,提出了基于W... 详细信息

随着高校智慧化图书馆的建设和发展,室内定位技术在具有位置感知的智慧图书馆建设和管理中的作用日益重要。针对现有的基于WLAN的位置指纹定位技术在图书馆复杂环境下定位精度不高的问题,在考虑到高校接入IPv6网络的基础上,提出了基于WLAN的位置指纹定位技术和基于6lo WPAN的WSN定位技术相互融合的定位技术。文章简要介绍了位置指纹结合6lo WPAN定位技术的工作原理,从硬件和软件两个方面设计了基于位置指纹结合6lo WPAN技术的图书馆智能定位系统的各个模块。基于此设计方案,实现了基于位置指纹和6lo WPAN的智能定位系统。从系统测试可知,位置指纹结合6lo WPAN定位技术比单一的位置指纹定位技术定位精度高。文章最后探讨了基于位置指纹结合6lo WPAN的智能定位系统的发展前景,为高校图书馆建设智能定位系统提供借鉴。

关键词：位置指纹 6loWPAN WLAN 图书馆智能定位系统

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科举制度和士人社会

思想与文化 2014年第2期15卷 171-205页

作者：杨国强华东师范大学思勉人文高等研究院

自封建变为郡县,则帝王治理天下不得不选官。汉代的察举征辟和魏晋的'九品官人法'在历史的嬗替中逐渐丧失了'尚贤'的政治理想,构成了科举制度兴起的历史因果。自隋唐之后,朝廷以文化考试选官,士子由读书应试入仕,随之形成的社会对流,便... 详细信息

自封建变为郡县,则帝王治理天下不得不选官。汉代的察举征辟和魏晋的'九品官人法'在历史的嬗替中逐渐丧失了'尚贤'的政治理想,构成了科举制度兴起的历史因果。自隋唐之后,朝廷以文化考试选官,士子由读书应试入仕,随之形成的社会对流,便既成为一个劝学的过程,又成为一个以利禄劝学的过程。但由一个一个个体士人汇成群体,既是'依周、程、张、朱之言以学孔孟'相类聚和'策德术心知以入慎思明辨'相类聚,则又一定会以他们的所学所聚影响社会。

关键词：科举士人社会教化