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Asia communications and Photonics Conference and Exhibition, ACP 2010

作者： Zhang, Liang Wu, Yanzhi Hu, Xiaofeng Wang, Tao Cao, Pan Su, Yikai State Key Lab. of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China

We propose and experimentally demonstrate a wavelength division multiplexed-passive optical network (WDM-PON) architecture supporting point-to-point, broadcast, and multicast services based on hybrid modulation format... 详细信息

ISBN: (纸本)9781424471119

关键词： Passive optical networks

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Dispersionless slow light in fiber Bragg gratings with active materials

Dispersionless slow light in fiber Bragg gratings with activ...

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International Symposium on Photonics and Optoelectronics, SOPO 2010

作者： Liu, Yang Jiang, Chun Lin, Yaming Xu, Wenhui State Key Lab. of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China

ISBN: (纸本)9781424449644

In this paper, an atomic system is suggested to be embedded in the fiber Bragg gratings (FBG) to reduce the group velocity and to eliminate the dispersion of slow light. We demonstrate numerically that the pulse can be transmitted at the group velocity 0.147c dispersionlessly in the FBG, compared with 0.193c and 56% of FWHM broadening without the atomic system. ©2010 IEEE.

关键词： Slow light

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Exploring the potentials of GMPLS for future applications

Exploring the potentials of GMPLS for future applications

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Asia communications and Photonics Conference and Exhibition, ACP 2010

作者： Sun, Weiqiang Jin, Yaohui Guo, Wei Hu, Weisheng State Key Lab. of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University 800# Dongchuan Rd. Shanghai 200240 China

Generalized Multiprotocol lab.l Switching, or GMPLS, is a suite of protocols to enable automated resource discovery, automated service provisioning and automated failure recovery. Driven by the benefit of improved net... 详细信息

ISBN: (纸本)9781424471119

关键词： BoD GMPLS OPEX automated failure recovery automated resource discovery automated service provisioning bandwidth allocation bandwidth on demand generalized multiprotocol lab.l switching multiprotocol lab.l switching network reliability telecommunication ne

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Design of triple-band CPW-fed planar monopole antenna using FDTD method

Design of triple-band CPW-fed planar monopole antenna using ...

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2010 International Conference on Microwave and Millimeter Wave Technology, ICMMT 2010

作者： Li, Zengrui Jiang, Huanbin Zhang, Hui Luo, Limei Guo, Qingxin Wang, Junhong Information Engineering School Communication University of China Beijing 100024 China Key Lab. of All Optical Network and Advanced Telecommunication Network EMC Beijing Jiaotong University Beijing 100044 China Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9781424457052

A novel planar monopole antenna fed by a coplanar waveguide (CPW) for wireless communications in the wireless local-area network (WLAN) bands is studied, which is analyzed by the Finite Difference Time Domain Method (FDTD). The bandwidths defined by return loss less than -10 dB of the proposed antenna are about 1.21 GHz, from 2.27 to 3.48 GHz, and about 1.88 GHz, from 5.12 to 7 GHz. They can cover the frequency bands of 2.4, 5.2, and 5.8 GHz of WLAN. The antenna has been constructed and tested, and both theoretical and experimental results are presented and discussed. © 2010 IEEE.

关键词： Finite difference time domain method

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Research on the distributed circuit parameters of the chamfered bent microstrip line

Research on the distributed circuit parameters of the chamfe...

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2010 International Conference on Microwave and Millimeter Wave Technology, ICMMT 2010

作者： Zhang, Hui Li, Zengrui Wang, Junhong Information Engineering School Communication University of China Beijing 100024 China Key Lab. of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044 China Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

ISBN: (纸本)9781424457052

The distributed circuit parameters of three kinds of chamfered bent microstrip lines are extracted and analyzed. In the implementation, the distributed voltage and current on the transmission lines are calculated first by the conformal finite differential time domain method (CFDTD). Then, the distributed circuit parameters are obtained by substituting the distributed voltage and current into the generalized transmission line equation (GTLE). The distributed parameters of the chamfered bent microstrip lines are compared with those from the right angle bent microstrip line. The differences of voltage, current and circuit parameters between chamfered bent lines and right angle bent line are analyzed by electromagnetic theory. © 2010 IEEE.

关键词： Electric lines

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Differentiated Protection Services with Failure Probability Guarantee for Workflow-Based Applications

Differentiated Protection Services with Failure Probability ...

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Asia communications and Photonics Conference and Exhibition(2010亚洲光纤通信与光弹博览会及研讨会 ACP 2010)

作者： Yaoquan Zhong Wei Guo Weiqiang Sun Yaohui Jin Weisheng Hu State Key Lab on Fiber-Optical Local Area Network and Advanced Optical Communication Systems Shanghai Jiao Tong University ShanghaiP.R.China 200240 China

ISBN: (纸本)9780819485571;0819485578

This paper introduces the concept of failure probability to measure the security level of communication tasks with different protection modes. Based on failure probability analysis, we develop three differentiated protection services provisioning strategies which can provide security level guarantee and network-resource optimization for workflow-based applications in optical grid.

关键词： differentiated protection services workflow-based application failure probability guarantee optical grid Legal Services server software web applications Differentiation differentiated batholith failure probability Heuristic algorithms Connections

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Theory of quenching quantum fluctuations of a laser system with a ladder-type configuration

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Physical Review A 2010年第2期81卷 023818-023818页

作者： Deshui Yu Jingbiao Chen []Institute of Quantum Electronics and State Key Laboratory of Advanced Optical Communication System & Network School of Electronics Engineering & Computer Science Peking University Beijing 100871 People’s Republic of China and State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai 200062 People’s Republic of China

The theory of a laser system with a ladder-type configuration is studied in detail based on the quantum Langevin approach. By using an external field to link the lower lasing level with another atomic level, whose decay rate is much larger, laser intensity significantly increases and the quantum-limited linewidth can be quenched. We also discuss the spectrum of fluctuations of the output field, and the result shows that the fluctuations at low frequencies can be much suppressed too. On the other hand, this quenching approach can realize a laser output between two atomic levels, whose decay rates do not satisfy the usual lasing condition that the decay rate of the lower lasing level should be larger than that of the upper lasing level. It will be very useful to realize a laser output with the wavelength we want. This quenching approach has been widely used in the absorption spectrum of the ytterbium optical lattice clock and in the laser cooling approach for calcium atoms. Here we apply it in the stimulated emission of lasers.

关键词： Ladders

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Features of PBB-TE Architecture and GMPLS Control Technology

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ZTE communications 2010年第3期8卷 13-16页

作者： Wei Jianwen Xie Rui Jin Yaohui The state key lab of advanced optical communication systems ＆ networks Shanghai Jiao Tong University Shanghai 200030 P. R. China Network ＆ Information Center of Shanghai Jiao Tong University Shanghai 200240 P. R. China

Time Division Multiplexing （TDM） transport networks are evolving to packet-oriented, and a variety of carrier-class packet transport technologies have emerged. Provider Backbone Bridge with Traffic Engineering （PBB-TE） is a connection-oriented packet transport technology that provides good scalab.lity and manageability, and guarantees Quality of Service （eoS）. Generalized Multi-Protocol lab.l Switching （GMPLS）is a mature transport network control plane technology that supports multiple data planes with different switching granularity. GMPLS-controlled PBB-TE is a promising solution for Packet Transport networks （PTN）.

关键词： GMPLS 多溴联苯控制技术 TE 广义多协议标签交换建筑时分多路复用分组传送

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Four-level superradiant laser with full atomic cooperativity

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Physical Review A 2010年第5期81卷 053809-053809页

作者： Deshui Yu Jingbiao Chen Department of Applied Physics Graduate School of Engineering The University of Tokyo Bunkyo-ku Tokyo 113-8656 Japan Institute of Quantum Electronics and State Key Laboratory of Advanced Optical Communication System & Network School of Electronics Engineering & Computer Science Peking University Beijing 100871 People's Republic of China State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai 200062 People's Republic of China

We investigate a four-level superradiant laser whose intensity is proportional to N2 and whose linewidth scales as 1/N2. In the absence of spontaneous emissions, we derive the stationary solutions of the atomic full cooperativity, analyze their stabilities, and find the corresponding irreducible representation based on group U(4). We also investigate the spectra of the phase and amplitude fluctuations of the fields inside and outside the cavity and find that the amplitude fluctuations of the output fields cannot be squeezed in the low-frequency limit, which is completely different from the three-level superradiant laser system. Finally, we consider the stationary solutions corresponding to the partial cooperativity due to the symmetry breaking of U(4) induced by the atomic spontaneous emissions.

关键词： Spontaneous emission

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The design and implementation of distributed resource manager in optical grid networks

The design and implementation of distributed resource manage...

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2009 Asia communications and Photonics Conference and Exhibition, ACP 2009

作者： Chen, Siwei Hu, Weisheng Guo, Wei Jin, Yaohui State Key Lab. of Advanced Optical Communication System and Network Shanghai Jiao Tong University Shanghai China

Effective management of large amount of heterogeneous resources in optical grid is critical to the performance of the grid. This article proposes a distributed system for an integrated management of both application a... 详细信息

ISBN: (纸本)9781557528773

关键词： Photonics

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