徐安士
波分复用自动光通信网络,高速大容量波分复用光纤通信系统,光因特网,相干光通信,光器件等方面的研究。
个性化签名
- 姓名:徐安士
- 目前身份:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
耳鼻咽喉科学
- 研究兴趣:波分复用自动光通信网络,高速大容量波分复用光纤通信系统,光因特网,相干光通信,光器件等方面的研究。
徐安士,北京大学教授, 博士生导师。北京大学电子学系主任、北京大学信息科学技术学院学术委员会委员、学位委员会委员。北京大学区域光纤通信网及新型光纤通信系统国家重点实验室主任(北京实验区)、学术委员会委员。北京大学光子与通信技术研究所所长。国家教育部高等学校电子信息与电气学科教学指导委员会委员,国家教育部电子信息科学与工程类专业教学指导分委员会副主任委员,国家自然科学基金委第二届信息科学专家咨询委员会委员、国家自然科学基金委第十届信息科学部专家评审组成员、第五届中国光学学会光电技术专业委员会常务委员、北京通信学会理事、国家信息产业部通信科学技术委员会电信传输专家咨询组成员、中国电子科技大学宽带光纤传输与通信系统技术教育部重点实验室学术委员会主任委员、北方交通大学全光网络与现代通信网教育部重点实验室学术委员会委员,北京邮电大学光通信与光波技术教育部重点实验室学术委员会委员、中国电子学会高级会员、中国通信学会高级会员、欧美同学会美国分会理事,美国光学学会(OSA, Optical Society of America)会员、新加坡南洋理工大学Honorary member of Network Technology Research Centre (NTRC) International Advisory Committee、兰州理工大学兼职教授、北京通信信息协会理事。
主要从事研究方向:波分复用自动光通信网络,高速大容量波分复用光纤通信系统,光因特网,相干光通信,光器件等方面的研究。
1999年作为总工程师建立全国第一套“深圳-广州2.488Gbit/s, 154km无中继波分复用光纤通信系统”获国家科技进步三等奖(排名第一);1998年因指导(副)的博士生毕业论文入选首届全国优秀百篇博士学位论文获优秀博士学位论文指导奖。1998年因“4×2.488Gbit/s, 154km波分复用光纤通信系统”获国家教委科技进步二等奖(排名第一)。1998年因科研转化成果“IHW-400A,4×2.5Gbit/s光纤波分复用系统”产品获广东省优秀新产品一等奖。2000年获北京大学杨芙清王阳元院士优秀教学科研奖;2003年教育部科技进步二等奖(第8);2003年获北京大学JDSU奖。近5年共发表论文二百余篇,其中SCI收录13篇,EI收录82篇, 合译书《光纤通信系统》、《工程电磁学》。面向21世纪大学教材《热学》作者之一。申请发明专利8项,已获批准2项。
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徐安士, 王勇, 吴德明
光电子·激光,2001,12(4):403~406,-0001,():
-1年11月30日
IP Over WDM是下一代网络的普遍模式,如何建立波长通道是非常重要的问题。本文就静态和动态情况分别讨论了直通光路的建立原则,介绍了相应的算法,并且各自给出例子。最后展望了IP网结合WDM网直通光路的发展前景。
IP Over WDM, 光路直通, 启发式算法, 重构, 保护/, 恢复
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【期刊论文】Optical Packet Buffer Constructed with EIT Medium
徐安士, ZHU Shuguang, XU Anshi, GUO Hong, CHEN Xuzong, WU Deming
,-0001,():
-1年11月30日
Under the guidance of the related theory detailed in this paper, we propose to construct optical packet buffer element used in the optical packet switched networks (OPSN) with electromagnetically induced transparency (EIT) medium. Two different types of buffers (i.e., traveling-type buffer and storing-type buffer) and corresponding buffer structures constructed with them are given.
optical packet buffer, electromagnetically induced transparency, optical storage
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【期刊论文】A New OPS Node Structure with WDM Time-Limited RAMs
徐安士, Shuguang Zhu, Anshi Xu, Hongxi Yin, Deming Wu, Xuzong Chen, Zhengbin Li
,-0001,():
-1年11月30日
Based on a new practical optical packet buffering method, a new Optical Packet Switching node structure is designed by us. This new node structure greatly reduces the complexity of the already-existing node structures by omiting the slot-selection stage.
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【期刊论文】Scheme of a WDM Time-Limited RAM for OPS
徐安士, Shuguang Zhu, Anshi Xu, Hongxi Yin, Deming Wu, Xuzong Chen
,-0001,():
-1年11月30日
We propose a new idea of utilizing Multiple Electromagnetically Induced Transparency Concurrence within a Single Medium to fullfill optical packet buffering and theoretically design a Wavelength Division Multiplexing (WDM) Random Access Memory (RAM).
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【期刊论文】10频道“波分复用+光纤放大器”全光通信实验系统①
徐安士, 吴德明, 向强盛, 汪自雄, 李爱国, 张侃, 顾全星, 禹阳生, 朱立新, 张肇仪, 史美琪, 汤烁, 韩乃蓦, 谢麟振
,-0001,():
-1年11月30日
在国内首次研制了使用1个光纤放大器的10频道102km无再生中继“WDM+EDFA”全光光纤传输实验系统。每频道传输码率为140Mb/s或280Gb/s NRz。所用光纤放大器为增苴平坦型,小信号增苴为35dB。系统全部采用国产DFB激光器,奋频道连长分别为153l、1535、1537、1545、1547、1549、155l、1559、156lnm,在波长为155lnm的频道内布置了2路频分复用(FDM)系统。波长分市遍及整个光纤放大器的通带。经无再生中继传输102km后,在误码丰为1×10-9条件下,实测了尚有数dB以上(最大为12dB)的功丰裕量。系统使用光栅合、分波器作为波分复用和解复用器,频道间隔为2nm及其整数倍,系统具有18个频道的能力。
光纤通信, 波分复用, 光纤放大器
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53浏览
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【期刊论文】A Five-Node Optical Wavelength Division Multiplexing Experimental Network in China*
徐安士, XU Anshi, ZHANG Hanyi**, GU Wanyi***, WU Deming, GUO Yili**, ZHOU Bingkun**, TAO Zhenning, CHEN Wenlu**, SHEN Yunfeng***, CHEN Zhangyuan, ZONG Let**, ZHANG Jie***, TANG Ying, FEI Yunsi**, WEI Xuesong***, ZHANG Baicheng, XU Zhigen**, LIU Xueyuan***, WANG Hongbo, SUN Jian***, ZHAO Gang, ZHAO Xiaodong*** and ZHAO Maohai***
Chinese Journal of Electronics 8 (3) 1999, 227-229,-0001,():
-1年11月30日
A five-node, eight-channel, wave-length division multiplexing (WDM) experimental all-optical network is present in China. The network has nodes of three 0ADMs and two OXCs, management function and self-healing function. Digital signal of 2.5 Gbit/s and analogue signals of CATV can be trans-mitted through and cross-connected. BER is less than 1.5
All-optical Network, OXC, OADM, Self-healing, Network management.,
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39浏览
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徐安士, Aiying Yang*, Xiaoxu Li, Anshi Xu, Deming Wu
Optics Communications 214 (2002) 133-139,-0001,():
-1年11月30日
This paper is contributed to discuss the impacts of group velocity dispersion, nonlinear Kerr effect and polarization mode dispersion in optical fibers. Using split-step Fourier method, we first analytically analyze that the interaction of Kerr effect and polarization mode dispersion results in the pulse asymmetric spectra. Then we study that polarization mode dispersion and group velocity dispersion play their roles independently, and that, depending on the relative magnitudes, the two factors affect the pulse differently. Finally, we research the combined impacts of group velocity dispersion, Kerr effect and polarization mode dispersion. Detailed investigation reveals that the combined effects are different in anomalous and normal group velocity dispersion regime. We point out that increased Kerr effect can suppress the impact of polarization mode dispersion in anomalous chromatic dispersion regime, and that, for the given values of incident power and polarization mode dispersion, anomalous group velocity should be large enough for the polarization mode dispersion to be effectively suppressed by the Kerr effect.
Optical fibers, Group velocity dispersion, Polarization mode dispersion, Nonlinear Kerr effect
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【期刊论文】10频道无再生中继使用光纤放大器的波分复用光纤传输实验系统
徐安士, 吴德明, 向强盛, 谢麟振
通信学报,199,28(3),116~120,-0001,():
-1年11月30日
在国内首次研制了10频道、102km无再生中继使用1个平坦增益光纤放大器的WDM光纤传输实验系统。每频道传输码率为140Mb/s(223-1 NRZ PRBS 或CMI PRBS)。系统全部采用国产DFB激光器,它们的波长分别为1531nm、1535nm、1537nm、1545nm、1547nm、1549nm、1551nm、1559nm、1561nm,在波稀薄为1551nm的频道内布置了2路频率间隔为10GHz的频分复用(FDM)系统,波长分布遍及整个光纤大器的通带。10个频道传输102km后,在误码率为1×10-2条件下,实测尚有数SB(最大为12dB)的功率裕量。系统使用了具有18个频道的能力且频道间隔为2nm的光■合、分波器,作为波分复用的解复用器。
波分复用, 光纤放大器, 光纤传输系统
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57浏览
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【期刊论文】GVD compensation schemes with considering PMD
徐安士, Aiying Yang, Anshi Xu and Deming Wu
CHINESE OPTICS LETTERS, 1 (4) 2003, 208-210,-0001,():
-1年11月30日
Three group velocity dispersion (GVD) compensation schemes, i.e., the post-compensation, pre- compensation and hybrid-compensation schemes, are discussed with considering polarization mode disper-sion (PMD). In the 10- and 40-Gbit/s non-return-zero (NRZ) on-off-key (0OK) systems, three physical factors, Kerr effect, GVD and PMD are considered. The numerical results show that, when the impact of PMD is taken into account, the GVD pre-compensation scheme performs best with more than 1 dB better of average eye-opening penalty (EOP) when input power is up to 10dBm in the 10-Gbit/s system. However the GVD post-compensation scheme performs best for the case of 40 Gbit/s with input power less than 13dBm, and GVD pre-compensation will be better if the input power increased beyond this range. The results are different from those already reported under the assumption that the impact of PMD is neglected. Therefore, the research in this paper provide a different insight into the system optimization when PMD. Kerr effect and GVD are considered.
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徐安士, Gang Yu, Anshi Xu
Photoulc Network Communlcations, 8: 3, 335-340, 2004,-0001,():
-1年11月30日
Although routing schemes based on global knowledge make most optimal routing decisions, they will occupy many resources to keep the state information of the network up-to-date. In tiffs work, we describe a fuzzy least-congested path (FLCP) routing algorlitm based on hierarchical liformation. Simulation shows that the blocking probability using FLCP is very near to the blocking probability using the least-congested path routing (LCP) algorittm based on global information. Under heavy traffic load, the FLCP alg orlihm is superior to the exhaustive algorittm (EA) and the LCP algorittm with unit information cost. The FLCP algorlitm provides better routing, even withincomplete information. Thus, the algorlitm requires less information of the network, particularly under heavy traffic load. In addition, an improved remote-path routing approach is provided to reduce the blocking probability of connection requests to a node that is many hops away from the source node.
fuzzy least-congested path routing, hierarchical liformation, remote-path wavelength routing, WDM network
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