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Generation of Intensity Squeezing in Laser Diodes by Weak External Cavity Feedback

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Chinese Physics Letters 1996年第10期13卷 734-736页

作者： zhang tian-cai HOU Zhan-jia WANG Jun-min XIE Chang-de PENG Kun-chi Institute of Opto-Electronics Shanxi UniversityTaiyuan 030006

We report the generation of intensity squeezing in a single-mode laser diode by weak external cavity feedback. The measurable squeezing of the output beam is 4.7%, corrected to 8.9% for the actual squeezing. This prov... 详细信息

关键词： measurable squeezing corrected

Generation of Tunable Amplitude-Squeezed Light by Injection Locking of a Laser Diode

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Chinese Physics Letters 2000年第6期17卷 422-424页

作者： WANG Jun-Min HE Ling-Xiang zhang tian-cai XIE Chang-De PENG Kun-Chi Institute of Opto-electronics Shanxi UniversityTaiyuan 030006

Tunable amplitude squeezing around the D_(2)line of cesium has been experimentally accomplished at room temperature in a quantum-well laser diode with light injection from a single-mode distributed Bragg-Reflector laser *** the master laser frequency is tuned,amplitude squeezing of the output light from the slave laser can be maintained at about 0.9dB throughout a tunabIe range of~l.7 GHz around the cesium D_(2)line.

关键词： Tunable laser diode

Sensitive Detection of Individual Neutral Atoms in a Strong Coupling Cavity QED System

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Chinese Physics Letters 2011年第4期28卷 101-104页

作者： zhang Peng-Fei zhang Yu-Chi LI Gang DU Jin-Jin zhang Yan-Feng GUO Yan-Qiang WANG Jun-Min zhang tian-cai LI Wei-Dong State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006 Department of Physics and Institute of Theoretical Physics Shanxi UniversityTaiyuan 030006

We experimentally demonstrate real-time detection of individual cesium atoms by using a high-finesse optical micro-cavity in a strong coupling regime.A cloud of cesium atoms is trapped in a magneto-optical trap positioned at 5mm above the micro-cavity *** atoms fall down freely in gravitation after shutting off the magnetooptical trap and pass through the *** cavity transmission is strongly affected by the atoms in the cavity,which enables the micro-cavity to sense the atoms *** detect the single atom transits either in the resonance or various *** single atom vacuum-Rabi splitting is directly measured to beΩ=2π×23.9 *** average duration of atom-cavity coupling of about 110μs is obtained according to the probability distribution of the atom transits.

关键词： coupling splitting enable

Modeling and Capacity Configuration Optimization of CRH5 EMU On-Board Energy Storage System

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Energy Engineering 2025年第1期122卷 307-329页

作者： Mingxing tian Weiyuan zhang Zhaoxu Su School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou730070China

In the context of the“dual carbon”goals,to address issues such as high energy consumption,high costs,and low power quality in the rapid development of electrified railways,this study focused on the China Railways High-Speed 5 Electric Multiple Unit and proposed a mathematical model and capacity optimization method for an onboard energy storage system using lithium batteries and supercapacitors as storage ***,considering the electrical characteristics,weight,and volume of the storage media,a mathematical model of the energy storage system was ***,to tackle problems related to energy consumption and power quality,an energy management strategy was proposed that comprehensively considers peak shaving and valley filling and power quality by controlling the charge/discharge thresholds of the storage *** optimization adopted a bilevel programming model,with the series/parallel number of storage modules as variables,considering constraints imposed by the Direct Current to Direct Current converter,train load,and *** improved Particle Swarm Optimization algorithm and linear programming solver were used to solve specific *** results show that the proposed onboard energy storage system can effectively achieve energy savings,reduce consumption,and improve power qualitywhile meeting the load and space limitations of the train.

关键词： Electrified railway regenerative braking bi-level programming on-board energy storage power quality capacity configuration

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一种红外图像颗粒噪声自适应滤波算法

红外技术 2013年第8期35卷 502-506页

作者：张彩甜河南经贸职业学院河南郑州450018

针对红外图像中常出现的颗粒噪声,在对自适应中值滤波(AMF)改进的基础上,提出了一种基于噪声检测的加权融合中值滤波算法。该算法对于噪声的滤除分为检测和滤波2个环节。首先根据对大量图像信息分布特征进行分析,设计出了较为通用的4类... 详细信息

针对红外图像中常出现的颗粒噪声,在对自适应中值滤波(AMF)改进的基础上,提出了一种基于噪声检测的加权融合中值滤波算法。该算法对于噪声的滤除分为检测和滤波2个环节。首先根据对大量图像信息分布特征进行分析,设计出了较为通用的4类噪声检测模版;其次分别采用各模版对噪声进行极值检测并加以标记,以区分出极值点与像素点;然后根据模版内极值点与非极值点的数目比例确定噪声点,并将非极值点取均值作为噪声滤波结果输出;对于区域的极值点,引入距离判别准则加以确认,被确认为噪声点的像素值通过模版内非极值点分别取均值和中值并加权融合得到;最后对4个模版处理后的滤波值进行等权融合,得到最终的滤波图像。分别与经典中值滤波(MF)、自适应中值滤波(AMF)、开关中值滤波(SMF)性能比较,实验表明,本文滤波算法对于高强度的斑点噪声具有较好的滤波性能,对于红外图像处理具有一定的借鉴价值。

关键词：红外图像颗粒噪声中值滤波(MF) 加权融合

用于铯原子内态操控的双光子拉曼激光的产生及应用

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物理学报 2015年第18期64卷 301-306页

作者：王志辉田亚莉李刚张天才山西大学光电研究所、量子光学与光量子器件国家重点实验室太原030006

双光子拉曼过程是一种有效制备和控制原子内态的方法,在原子内态操控和基于原子的量子信息处理中具有重要意义.研制用于特定原子的拉曼激光是实现该过程的重要一步.报道了利用光纤波导相位调制器及滤波器等实现用于铯原子内态操控的拉... 详细信息

双光子拉曼过程是一种有效制备和控制原子内态的方法,在原子内态操控和基于原子的量子信息处理中具有重要意义.研制用于特定原子的拉曼激光是实现该过程的重要一步.报道了利用光纤波导相位调制器及滤波器等实现用于铯原子内态操控的拉曼激光的方法,并成功用于单个铯原子的内态精密操控.通过4.6 GHz的微波信号源直接驱动波导相位调制器高效地获得光场的调制边带,并利用自由光谱区为9.19 GHz的法布里-珀罗腔将载波及二阶边带滤掉,获得了频率精确、相差9.19 GHz的拉曼激光.经过基于光纤振幅调制器的功率稳定系统,最终可以获得总功率为73μW、长时间内波动为2.2%的拉曼激光束,并将此光束用于激发单个铯原子,实现了|6S_(1/2),F=4,mF=0>和|6S_(1/2),F=3,mF=0>之间的可控拉比操作.

关键词：双光子拉曼过程拉曼激光光纤波导相位调制器干涉滤波器

Polymer microbottle with flexible tunability for ultrasensitive ultrasound sensing

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Science China(Physics,Mechanics & Astronomy) 2025年

作者： Liaosha Kuang Jialve Sun Shengnan Huangfu Tinglan Chen Zijing cai tian Xu Xuanyi zhang Bo Ni Fangxing zhang School of Physics and Technology Nantong University Peking University Yangtze Delta Institute of Optoelectronics State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking University School of Electronic Information Engineering Shanghai DianJi University

Optical whispering-gallery-mode microcavities have attracted significant attention for their potential in ultrasensitive ultrasound sensing, despite always relying on expensive tunable lasers in applications. In this study, we integrated an electrothermal tuning function inside the microcavity, enabling fast scanning of modes by applying voltages, which helps provide real-time searching and tracking of the optimal mode. Our device demonstrated a quality factor exceeding 10～6with a broad tuning range over 33 GHz. This structure achieved high sensitivity in ultrasound detection, with a noise equivalent pressure（NEP） of 3.35 mPa/Hz1/2at 20 MHz. We further reported the advantages of the mode thermal broadening effect for ultrasound detection, with successfully obtaining high-contrast photoacoustic images. Our research introduces an innovative approach for cost-effective, high-stability ultrasound detection with microcavity, showing great value for application in photoacoustic imaging.

关键词：

线极化Bell-Bloom测磁系统中抽运光对磁场灵敏度的影响

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物理学报 2019年第9期68卷 84-92页

作者：杨晨左冠华田壮壮张玉驰张天才山西大学光电研究所量子光学与光量子器件国家重点实验室极端光学协同创新中心太原030006 山西大学物理电子工程学院太原030006

利用适用于线极化Bell-Bloom测磁系统的布洛赫方程和含有自旋弛豫的速率方程,以铯原子为研究对象,分析了抽运光对磁场灵敏度的影响,并在实验上分别采用与铯原子D1线和D2线共振的线偏光作为抽运光和探测光,用充有缓冲气体的气室进行了实... 详细信息

利用适用于线极化Bell-Bloom测磁系统的布洛赫方程和含有自旋弛豫的速率方程,以铯原子为研究对象,分析了抽运光对磁场灵敏度的影响,并在实验上分别采用与铯原子D1线和D2线共振的线偏光作为抽运光和探测光,用充有缓冲气体的气室进行了实验.实验结果与理论分析一致,均表明只有在一定的光强范围内,增大抽运光光强可以提高磁场灵敏度.且利用这一方法分析了原子的自旋弛豫对磁场灵敏度的影响.这项研究对于深入认识线极化的Bell-Bloom测磁系统,以及如何通过优化系统实现磁场灵敏度的提高具有重要的意义.

关键词：磁场测量磁共振自旋弛豫原子极化

Optimizing battery deployment: Aging trajectory prediction enabling homogenous performance grouping

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Journal of Energy Chemistry 2025年第1期100卷 565-577页

作者： Shuquan Wang Feng Gao Zhan Ma Hao tian Yusen zhang School of Control Science and Engineering Shandong University Key Lab of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University

As battery deployments in electric vehicles and energy storage systems grow, ensuring homogeneous performance across units is crucial. We propose a multi-derivative imaging fusion(MDIF) model, employing advanced imaging and machine learning to predict battery aging trajectories from minimal initial data, thus facilitating effective performance grouping before deployment. Utilizing a derivative strategy and Gramian Angular Difference Field for dimensional enhancement, the MDIF model uncovers subtle predictive features from discharge curve data after only ten cycles. The architecture includes a parallel convolutional neural network with lateral connections to enhance feature integration and *** on a self-developed dataset, the model achieves an average root-mean-square error of 0.047 Ah and an average mean absolute percentage error of 1.60%, demonstrating high precision and *** robustness is further validated through transfer learning on two publicly available datasets, adapting with minimal retraining. This approach significantly reduces the testing cycles required, lowering both time and costs associated with battery testing. By enabling precise battery behavior predictions with limited data, the MDIF model optimizes battery utilization and deployment strategies, enhancing system efficiency and sustainability.

关键词： Lithium-ion battery Battery prognostics Fusion model Convolutional neural network Transfer learning