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Asia communications and Photonics Conference, ACPC 2014

作者： Wang, Xiaodong Yi, Lilin Li, Zhengxuan Huang, Jinqing Han, Jun Hu, Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China II-VI Network Solutions Shanghai200233 China

An ODC with fixed dispersion value is used in OLT to manage the dispersion of 10Gbps upstream directly-modulated signals, achieving 51-dB loss budget within 100km transmission distance thanks to the positive chirp of ... 详细信息

ISBN: (纸本)9781557528520

关键词： Budget control

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Optimized hierarchical OXC architecture for elastic optical network

Optimized hierarchical OXC architecture for elastic optical ...

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OptoElectronics and communications Conference, OECC

作者： Xin Chen Bingli Guo Jing Guan Songwe Ma Juhao Li Zhangyuan Chen Yongqi He State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing China

We proposed a size-scalab.e and cost-efficient OXC architecture using limited port fine-granularity bandwidth-variable wavelength selective switches and waveband selective switches for elastic optical network, as well... 详细信息

关键词： optical switches Ports (Computers) optical fiber networks Routing optical fibers Bandwidth

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Using a low-pass filter to implement source monitoring in quantum key distribution

Using a low-pass filter to implement source monitoring in qu...

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General Assembly and Scientific Symposium, URSI

作者： Yucheng Qiao Zhengyu Li Xiang Peng Hong Guo State Key Laboratory of Advanced Optical Communication System and Network Peking University Beijing P. R. China

ISBN: (纸本)9781467352246

Quantum key distribution (QKD) has been proven to be unconditionally secure in theory. The light source of QKD is assumed to be trusted in the standard security analysis. However, this assumption may be deviated in a real system, which will cause `untrusted source' problem. To solve the problem, several source monitoring schemes have been proposed, in which passive schemes are more practical than active schemes. In this paper, we first review of these passive schemes, and then propose a new demonstration of the passive scheme with two-threshold detection using a low-pass filter, which can be well implemented in practical.

关键词： Detectors Photonics Low-pass filters Monitoring Security optical pulses Quantum mechanics

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A possible redefinition of candela using light shift

A possible redefinition of candela using light shift

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General Assembly and Scientific Symposium, URSI

作者： Xiaobo Xue Zhongjie Chen Xiang Peng Jingbiao Chen Hong Guo State Key Laboratory of Advanced Optical Communication System and Network Peking University Beijing P. R. China

Candela is one of the seven base units in the SI. The units of time and length have been defined in quantum method and the others of the base units have the potential to be redefined in quantum method or on fundamental constants, except candela. With the accuracy of measurement and application increasing, the requirement of a more accurate definition of candela is becoming urgent. In this paper, we propose a quantum method to redefine the unit of luminous intensity candela. An example shows that the accuracy of candela under the new definition can reach even better than 10 -6 with the help of Rb atomic clock.

关键词： Atomic clocks Frequency measurement Uncertainty Measurement by laser beam Energy states Laser transitions Laser beams

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616 MHz repetition rate sub-100fs amplifier-similariton Yb:Fiber laser

616 MHz repetition rate sub-100fs amplifier-similariton Yb:F...

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OptoElectronics and communications Conference, OECC

作者： Chen Li Guizhong Wang Tongxiao Jiang Peng Li Aimin Wang Zhigang Zhang State Key Lab State Key Laboratory of Advanced Optical Communication System and Networks Peking University Beijing P.R. China

We report a compact Yb:fiber ring laser operated at 616 MHz. The average output power is 450 mW at a pump power of 900 mW. The dechirped pulse width is 98 fs.

关键词： optical fiber amplifiers Fiber lasers Cavity resonators Laser mode locking optical fiber dispersion optical fiber polarization

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The 5th International Conference on Biomedical Engineering and Biotechnology (ICBEB 2016) Abstracts

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BMC MEDICAL IMAGING 2016年第SUPPL 1期16卷 65-65页

作者： [Anonymous] Department of MRI Shandong Medical Imaging Research Institute Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China Department of Interventional Radiology Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China College of Information Science and Technology Engr. Research Center of Digitized Textile & Fashion Tech. for Ministry of Education Donghua University Shanghai 201620 China Intelligent multimedia information processing Lab College of Software Northeastern University Shenyang Liaoning Province 110004 China Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China School of Computer Science and Technology Nanjing Normal University Nanjing China Department of Electrical Engineering The City College of New York CUNY New York USA Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing Nanjing China School of Electronic Science and Engineering Nanjing University Nanjing Jiangsu 210046 China College of Engineering Nanyang Technological University Singapore 639798 Singapore School of Electronic Information Shanghai Dianji University Shanghai China School of Natural Sciences and Mathematics Shepherd University Shepherdstown WV 25443 USA Davis College of Agriculture Natural Resources and Design West Virginia University Morgantown WV 26505 USA State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China Center of Medical Physics and Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei China College of Agricultural and Life Sciences University of Florida Gainesville FL 32611 USA Courant Institute of Mathematical Sciences New York University New York NY 10012 USA Translational Imaging Division & MRI Unit Columbia University and New York State Psychiatric Institute New York NY 10032 USA Guangxi Key Laboratory of Manufacturing System & Adv

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A Potassium Atom Four-Level Active optical Clock Scheme

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Chinese Physics Letters 2013年第4期30卷 34-37页

作者： ZHANG Sheng-Nan WANG Yan-Fei ZHANG Tong-Gang ZHUANG Wei CHEN Jing-Biao Institute of Quantum Electronics and State Key Laboratory of Advanced Optical Communication and System Network School of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871

We present an active optical clock scheme with a four-level quantum potassium *** calculate the population probabilities of each state using the density *** the steady state,ρ33 andρ55 are equal to 8.3%and 3.5%,respectively,and the population inversion between the 5S1/2 and 4P3/2 states is built up in the thermal potassium cell with a 404.7 nm pumping *** to the mechanism of the active optical clock,under the action of the 404.7 nm pumping laser,the scheme can output a 1252.2 nm quantum-limited-linewidth laser,which can be directly used as an active optical frequency standard.

关键词： pumping potassium quantum

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Distribution of populations in excited states of electrodeless discharge lamp of Rb atoms

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Chinese Science Bulletin 2013年第16期58卷 1876-1881页

作者： TAO ZhiMing WANG YanFei HONG YeLong WANG DongYing ZHANG ShengNan ZHUANG Wei CHEN JingBiao State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum Electronics School of Electronics Engineering & Computer Science Peking University Department of Physics Bijie University

The intensity of fluorescence spectral lines of Rb atoms in the region of 350-1110nm is measured in eletrodeless discharge lamp. The population ratio between the excited states is calculated according to the spontaneous transition probabilities with rate equations. At the same time, the population density of energy level is also obtained. The results provide the potential applications of electrodeless discharge lamp in atomic filter and optical frequency reference at higher excited states without a pumping laser.

关键词：原子激发态无极灯铷原子种群分布人口密度无极放电灯原子滤光器概率计算

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Global evolution of an analyzer angle on the Faraday anomalous dispersion optical filter at 1529 nm

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Chinese Science Bulletin 2013年第36期58卷 4582-4587页

作者： TAO ZhiMing WANG YanFei HONG YeLong WANG DongYing ZHUANG Wei CHEN JingBiao State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum Electronics School of ElectronicsEngineering and Computer Science Peking University Department of Physics Bijie University

In order to realize laser frequency stabilization,the global evolution of an analyzer angle on the electrodeless-discharge-vaporlamp-based excited-state Faraday anomalous dispersion optical filter(LESFADOF)with a single transmission peak operating on the Rb1529 nm(5P3/2-4D5/2)is *** find that the transmission of the line center peak at 80°arrives at 14%in a 3 cm length lamp contained natural Rb mixed with 2 torr Xe buffer gas operating at 250°C with 176 MHz radio *** it is used to realize laser frequency stabilization,the LESFADOF at near 80°is *** a single transmission peak or double transmission peaks depend on the rf voltage when two polarizers are crossed.

关键词：法拉第反常色散光学滤波器演进激光稳频无电极放电无线电频率频率稳定激发态

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Cs 455nm Nonlinear Spectroscopy with Ultra-narrow Linewidth

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Chinese Physics Letters 2013年第6期30卷 50-52页

作者： WANG Dong-Ying WANG Yan-Fei TAO Zhi-Ming ZHANG Sheng-Nan HONG Ye-Long ZHUANG Wei CHEN Jing-Biao State Key Laboratory of Advanced Optical Communication System and Network Institute of Quantum ElectronicsSchool of Electronics Engineering&Computer SciencePeking UniversityBeijing 100871

Nonlinear spectroscopy has become a useful tool in laser cooling,frequency stabilization and so *** use the 455.5 nm light beam output of an external cavity diode laser to perform the saturation spectroscopy signal and polarization spectroscopy signal on the 6S_(1/2)→7P3/2 transition in *** measured linewidth of the F4→4,5 transition is as narrow as 1.40 MHz and that of the F3→2,3 transition is 1.67 *** of them are very close to the natural linewidth of about 1.2 *** result is the narrowest measured linewidth of Cs 455 nm saturation spectroscopy signal to our knowledge.

关键词： polarization narrow signal

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