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Scalable parallel ultrafast optical random bit generation based on a single chaotic microcomb

Light(Science & Applications) 2024年第4期13卷 637-644页

作者： Pu Li Qizhi Li Wenye Tang Weiqiang Wang Wenfu Zhang Brent ELittle sai tek chu KAlan Shore Yuwen Qin Yuncai Wang Institute of Advanced Photonics Technology School of Information EngineeringGuangdong University of TechnologyGuangzhou 51006China. Key Laboratory of Photonic Technology for Integrated Sensing and Communication Ministry of Education of ChinaGuangdong University of TechnologyGuangzhou 51006China. Guangdong Provincial Key Laboratory of Information Photonics Technology Guangdong University of TechnologyGuangzhou 51006China. Key Laboratory of Advanced Transducers andIntelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China. State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China. Department of Physics and Materials Science City University of Hong KongHong KongChina. School of Electronic Engineering Bangor UniversityBangorWales LL571UTUK

Random bit generators are critical for information security,cryptography,stochastic modeling,and *** and scalability are key challenges faced by current physical random bit ***,we propose a massively parallel scheme for ultrafast random bit generation towards rates of order 100 terabit per second based on a single micro-ring resonator.A modulation-instability-driven chaotic comb in a micro-ring resonator enables the simultaneous generation of hundreds of independent and unbiased random bit streams.A proof-of-concept experiment demonstrates that using our method,random bit streams beyond 2 terabit per second can be successfully generated with only 7 comb *** bit rate can be easily enhanced by further increasing the number of comb lines *** approach provides a chip-scale solution to random bit generation for secure communication and high-performance computation,and offers superhigh speed and large scalability.

关键词： resonator random chaotic

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Ultrafast Dynamics of Polythiophene with Phenyl Vinylene Branches Studied by Femtosecond Fluorescence Spectroscopy in Solution

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Chinese Physics Letters 2011年第11期28卷 228-231页

作者： chu sai-sai GAO Chao WANG Shu-Feng GONG Qi-Huang State Key Laboratory for Mesoscopic Physics Department of PhysicsPeking UniversityBeijing 100871 Xi’an Modern Chemistry Research Institute Xi’an 710065

Two polythiophene based polymers,poly[(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)-co-thiophene](PT1)and poly(3-[2-[4-(2-ethyl-hexyloxy)-phenyl]-vinyl]-thiophene)(PT2),are synthesized and investigated by static,picosecond fluorescence spectroscopies and the femtosecond up-conversion technique in *** with pristine poly(3-hexylthiophene)(P3HT),PT1 and PT2,in which the main chains are decorated with phenyl vinylene present a‘camel back’structure in the absorption *** vinylene side chains induce a new process of charge transfer,chain twisting motion and defect-induced fluorescence quenching at time scales of 1 ps,10 ps and 150 ps,respectively.

关键词： solution spectra vinyl

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基于高效目标的多能互补能源站运行策略研究

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暖通空调 2025年第1期55卷 29-36页

作者：褚赛刘启明许抗吾牛笑晨孙林娜北京市勘察设计研究院有限公司北京100038

以北京市海淀区某大型会议中心为例,采用DeST建立建筑能耗模型,进行了全年逐时负荷计算,依据项目所在地政策要求、资源禀赋及场地条件,确定采用地源热泵+空气源热泵的复合式系统,地源热泵制冷装机占比30.11%,制热装机占比32.21%,可再生... 详细信息

以北京市海淀区某大型会议中心为例,采用DeST建立建筑能耗模型,进行了全年逐时负荷计算,依据项目所在地政策要求、资源禀赋及场地条件,确定采用地源热泵+空气源热泵的复合式系统,地源热泵制冷装机占比30.11%,制热装机占比32.21%,可再生能源制冷制热装机占比均为100%。通过对多能互补能源站中地源热泵机组、空气源热泵机组及循环水泵等设备的运行特性分析,提出了基于高效目标的机组最优能效加载+水泵变压差变流量控制策略,并与常规控制系统设定的机组顺次加载+水泵定压差变流量控制策略进行了全年运行能耗比较。结果显示:基于高效目标下的能源站控制策略供暖综合能效为3.36,较常规控制策略节能4.25%,能效提升4.44%;制冷综合能效为4.77,较常规控制策略节能11.03%,能效提升12.40%。该控制策略节能效果显著,可为类似多能互补能源站节能控制策略制定提供借鉴。

关键词：多能互补高效能源站控制策略最优能效变压差变流量

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Analysis of formation and slope stability in Caofeidian Channel in Bohai Bay

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China Geology 2019年第2期2卷 189-197页

作者： Hong-xian chu sai Mei Xiao-hui Gao Zhong-hua Fang Jing Feng Key Laboratory of Coastal Wetland Biogeosciences Qingdao Institute of Marine GeologyChina Geological SurveyMinistry of Natural ResourcesQingdao 266071China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

In this paper, by studying bathymetric survey and shallow seismic detection data over multiple periods of history, the authors outline the geomorphic features of the Caofeidian Channel. The results of our studies indicate that the channel at the front end is dominated by erosion. The maximum water depth reaches 42.2 m, which sets the highest record for the water depth in Bohai Bay;the authors preliminarily conclude that the formation of the early channel occurred because the subsidence rate of the deep structure is slightly smaller than the deposition rate of the upper strata, and the Caofeidian Channel has existed for a long time, over 20 ka. The trending of the channel experienced a transition from the NS to the NE and then NW direction;the authors conclude that endogenic and exogenic processes, such as geological structures, the evolution of the ancient Luanhe River Delta, marine hydrodynamics, and human activity, jointly control the development and evolution of the geographic system in the Caofeidian sea area. The slope stabilities under the extreme conditions of a heavy storm and an earthquake are analyzed by performing simulations.

关键词： Caofeidian Channel Tidal current Deposition Erosion Stability

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风速时间序列模拟的模型有效性验证及代表性风场实例分析

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振动与冲击 2019年第15期38卷 73-79页

作者：马赛褚福磊清华大学机械工程系

在风力发电场的合理选址以及风力发电机组的结构设计阶段,能量谱与功率谱模型对于风力发电机组的系统方案有着直接的影响,特别是在具体结构设计阶段选取恰当的功率谱模型是至关重要的,但目前对具体模型的选择依据尚不明确。针对能量谱... 详细信息

在风力发电场的合理选址以及风力发电机组的结构设计阶段,能量谱与功率谱模型对于风力发电机组的系统方案有着直接的影响,特别是在具体结构设计阶段选取恰当的功率谱模型是至关重要的,但目前对具体模型的选择依据尚不明确。针对能量谱与功率谱两种重要的风速数据分析模型,以国内五处地区代表性风场的全年风速测试数据为基础,进行了能量谱与功率谱的分析,从分析结果中得出了如下两个结论:①我国东南沿海地区风场的风力资源最为丰富,其有效风能密度区(200~400 W/m^2)持续时间最长;北部地区风场的风力资源也较为丰富,且在高风能密度区(>500 W/m^2)具有一定优势;对于主要风力资源集中在低风能密度区(<200 W/m^2)的部分地区风场,在风力发电设备选型时应该有针对性的进行结构设计,实现低速风力资源的高效利用。②对于具体风场的风速模型选择准则给出了实例验证与建议:Mann功率谱模型表现出与各风场实测数据良好的一致性,应该在进行结构设计时作为主要备选。

关键词：风速时间序列能量谱模型功率谱模型模型选择依据

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Low-loss and polarization insensitive 32×4 optical switch for ROADM applications

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Light(Science & Applications) 2024年第5期13卷 875-884页

作者： Xiaotian Zhu Xiang Wang Yanlu Huang Liyan Wu chunfei Zhao Mingzhu Xiao Luyi Wang Roy Davidson Yanni Ou Brent E.Little sai T.chu Department of Physics City University of Hong KongTat Chee AvenueHong KongChina. QXP Technologies Inc. NO.15th Shanglinyuan 1st RoadXi’anShaanxi 710119China. State Key Laboratory of Information of Photonics and Optical Communications School of Electronic EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China

Integrated switches play a crucial role in the development of reconfigurable optical add-drop multiplexers(ROADMs)that have greater flexibility and compactness,ultimately leading to robust single-chip *** decades of research on switches with various structures and platforms,achieving a balance between dense integration,low insertion loss(IL),and polarization-dependent loss(PDL)remains a significant *** this paper,we propose and demonstrate a 32×4 optical switch using high-index doped silica glass(HDSG)for ROADM *** switch is designed to route any of the 32 inputs to the express ports or drop any channels from 32 inputs to the target 4 drop ports or add any of the 4 ports to any of the 32 express *** switch comprises 188 MachZehnder Interferometer(MZI)type switch elements,88 optical vias for the 44 optical bridges,and 618 waveguidewaveguide crossings with three-dimensional(3D)*** 1550 nm,the fiber-to-fiber loss for each express channel is below 2 dB,and across the C and L bands,below 3 *** each input channel to all 4 drop/add channels at 1550 nm,the loss is less than 3.5 dB and less than 5 dB across the C and L *** PDLs for all express and input channels to the 4 drop/add channels are below 0.3 dB over the C band,and the crosstalk is under−50 dB for both the C and L bands.

关键词： polarization ROADM optical

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罕见β-珠蛋白基因簇3.5 kb缺失突变的鉴定

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中国实验血液学杂志 2025年第1期33卷 175-179页

作者：番云华段翠琳罗赛丽葛世军禹崇飞席珏敏褚嘉佑杨昭庆德宏州人民医院检验科云南芒市678400 昆明医科大学云南昆明650500 中国医学科学院医学生物学研究所云南昆明650118

目的:明确云南4例疑似β地中海贫血患者的基因突变类型,并对基因型与血液学表型特征进行分析。方法:对4例来自云南地中海贫血流行区傣族、血液学表型与常见地中海贫血基因突变检测结果不符的疑似β地中海贫血样本进行全基因组测序,利用... 详细信息

目的:明确云南4例疑似β地中海贫血患者的基因突变类型,并对基因型与血液学表型特征进行分析。方法:对4例来自云南地中海贫血流行区傣族、血液学表型与常见地中海贫血基因突变检测结果不符的疑似β地中海贫血样本进行全基因组测序,利用聚合酶链式反应(PCR)和Sanger DNA测序技术对β-珠蛋白基因簇的突变进行确认。结果:4例患者存在3.5 kb的β-珠蛋白基因簇罕见大片段缺失性突变(NC_000011.10:g.5224302-5227791del3490bp),其中1例检测出合并HbE突变,1例合并CD17突变,这2例突变杂合子患者呈现中度贫血表型,另外2例单纯3.5 kb缺失突变杂合子患者呈现轻度贫血表型。结论:罕见β-珠蛋白基因簇3.5 kb缺失的杂合子携带者可产生轻度贫血,若合并其他β-珠蛋白基因点突变会导致贫血症状加重。在地中海贫血高发区,可疑患者需要进行基因检测以避免漏诊或误诊。

关键词： β-地中海贫血遗传疾病基因突变基因检测

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Four-wave mixing in silicon-nanocrystal embedded high-index doped silica micro-ring resonator

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Journal of Semiconductors 2021年第4期42卷 104-110页

作者： Yuhua Li Xiang Wang Roy Davidson Brent E.Little sai Tak chu Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018China Department of Physics City University of Hong KongHong Kong 999077China QXP Technology Inc. Xi’an 710119China State Key Laboratory of Transient Optics and Photonics XIOPMCASXi’an 710119China

A nonlinear integrated optical platform that allows the fabrication of waveguide circuits with different material composition,and at small dimensions,offers advantages in terms of field enhancement and increased interaction length,thereby facilitating the observation of nonlinear optics effects at a much lower power *** enhance the nonlinearity of the conventional waveguide structure,in this work,we propose and demonstrate a microstructured waveguide where silicon rich layer is embedded in the core of the conventional waveguide in order to increase its *** embedding a 20 nm thin film of silicon nanocrystal(Si-nc),we achieve a twofold increase of the nonlinear parameter,γ.The linear relationship between the fourwave mixing conversion efficiency and pump power reveals the negligible nonlinear absorption and small dispersion in the micro-ring *** simple approach of embedding an ultra-thin Si-nc layer into conventional high-index doped silica dramatically increases its nonlinear performance,and could potentially find applications in all-optical processing functions.

关键词： four-wave mixing silicon nanocrystal high-index doped silica micro-ring resonator

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Influencing factors and evaluation application of regional crustal stability in the Bohai Strait

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China Geology 2019年第3期2卷 354-363页

作者： sai Mei Hong-xian chu Ling-yu Dong Zhong-hua Fang Pan-feng Li Fei-fei Zhang Rui Shan Tie-hu Zhao Qingdao Institute of Marine Geology China geological surveyMinistry of Natural ResourcesQingdao 266071China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Due to the extremely complex geological conditions in the Bohai Strait, active faults is very developed and earthquake activity occurs frequently. It is of great importance to evaluate the regional crustal stability for the planning and construction of the Trans-straits Passage. In this study, the authors carry out the evaluation by means of buffer analysis, topology analysis and overlay analysis based on ArcGIS software. The evaluation mainly analyzed six assessment factors of Bohai Strait including neotectonic activity, active faults distribution, seismicity, tectonic stress fields, Bouguer gravity anomaly and geological disasters. In brief, the crustal stability of the eastern North Yellow Sea Basin is best, while that of the Bohai Basin and southwest Bohai Strait is poor. Meanwhile, small and frequent earthquakes in the southern Strait and geological disasters developed in the northern and central Strait such as tidal ridge and shallow gas which may adversely impact on the Trans-straits Passage construction.

关键词： Regional crustal stability Trans-straits Passage Coastal geological survey Engineering GIS Bohai Strait China

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Athermal third harmonic generation in micro‐ring resonators

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Opto-Electronic Advances 2020年第12期3卷 17-27页

作者： Shaohao Wang Yuhua Li Brent ELittle Leiran Wang Xiang Wang Roy RDavidson sai Tak chu FZU-Jinjiang Joint Institute of Microelectronics Jinjiang Science and Education ParkFuzhou UniversityJinjiang 362200China Department of Physics City University of Hong KongKowloon TongHong Kong 999077China State Key Laboratory of Transient Optics and Photonics Xi’an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi’an 710119China University of Chinese Academy of Sciences Beijing 100049China QXP Technology Xi’an 710311China Department of Microelectronics Science and Technology Qi Shan CampusFuzhou UniversityFuzhou 350108China Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018China

Nonlinear high-harmonic generation in micro-resonators is a common technique used to extend the operating range of applications such as self-referencing systems and coherent communications in the visible ***,the generated high-harmonic emissions are subject to a resonance shift with a change in *** present a comprehensive study of the thermal behavior induced phase mismatch that shows this resonance shift can be compensated by a combination of the linear and nonlinear thermo-optics *** this model,we predict and experimentally demonstrate visible third harmonic modes having temperature dependent wavelength shifts between−2.84 pm/ºC and 2.35 pm/ºC when pumped at the *** providing a new way to achieve athermal operation,this also allows one to measure the thermal coefficients and Q-factor of the visible *** steady state analysis,we have also identified the existence of stable athermal third harmonic generation and experimentally demonstrated orthogonally pumped visible third harmonic modes with a temperature dependent wavelength shift of 0.05 pm/ºC over a temperature range of 12º*** findings promise a configurable and active temperature dependent wavelength shift compensation scheme for highly efficient and precise visible emission generation for potential 2f–3f self-referencing in metrology,biological and chemical sensing applications.

关键词： third-harmonic generation thermodynamics micro-resonators

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