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optical Fiber communication (OFC) Conference

作者： Yuanyuan Lu Cishuo Yan Qingjiang Chang Qiang Li Yikai Su Weisheng Hu State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiaotong University Shanghai China

We propose and experimentally demonstrate a novel all-optical NRZ to FSK format conversion scheme to interconnect a MAN and a PON system. Upstream data is re-modulated on downstream converted FSK format.

ISBN: (纸本)9781557528599

关键词： Passive optical networks optical signal processing Frequency shift keying Semiconductor optical amplifiers optical network units optical receivers optical modulation Fiber nonlinear optics optical saturation Nonlinear optics

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A WDM-PON system providing quadruple play service with converged optical and wireless access

A WDM-PON system providing quadruple play service with conve...

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European Conference on optical communication (ECOC)

作者： Yue Tian Yikai Su State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiaotong University Shanghai China

We demonstrate a WDM-PON structure providing quadruple play service integrating optical and wireless access based on hybrid modulation formats. Downstream signals are re-modulated for upstream transmission enabling so... 详细信息

关键词： Passive optical networks RF signals optical modulation optical network units optical mixing optical transmitters Amplitude shift keying Radio frequency Arrayed waveguide gratings Integrated optics

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An optical PSK-RF-signal Transmitter based on ASK-to-PSK Conversion and Self-heterodyning

An Optical PSK-RF-signal Transmitter based on ASK-to-PSK Con...

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optical Fiber communication (OFC) Conference

作者： Tong Ye Qingjiang Chang Junming Gao Yikai Su State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiaotong University Shanghai China

An optical transmitter for generating phase-shift-keying (PSK) radio-frequency (RF)-signal is experimentally demonstrated, where a high-frequency RF-carrier is obtained by self-heterodyning and the PSK-modulation is a... 详细信息

ISBN: (纸本)9781557528599

关键词： optical transmitters Phase shift keying Amplitude shift keying optical mixing Signal generators Frequency optical modulation Radio transmitters optical filters optical fiber communication

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Per-Flow Re-Sequencing in Load-Balanced Switches by Using Dynamic Mailbox Sharing

Per-Flow Re-Sequencing in Load-Balanced Switches by Using Dy...

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IEEE International Conference on communications (ICC)

作者： H. Cheng Y. Jin Y. Gao Y. Yu W. Hu N. Ansari State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication System Shanghai Jiaotong University Shanghai China Advanced Networking Laboratory New Jersey Institute of Technology Newark NJ USA

Load-balanced switches have received much attention because they are more scalable than other switch architectures. However, a load-balanced switch has the problem of packet mis-sequencing. In this paper, we propose a dynamic mailbox sharing (DMS) scheme to eliminate the mis-sequencing problem of load-balanced switches only at the cost of a very small increase of delay. The key idea is to keep packets of the same flow in order in the load-balanced switch. The DMS scheme is based on two statistical facts in operational networks: the number of simultaneous active flows in the router buffer is far less than that of in-progress flows, and most of the intra-flow packet intervals are longer than the packet delay in the high speed router. In DMS, the packet sequence of the same flow arrived in the input ports is recorded in the mailbox maintained in the output ports. Then, packets of the same flow are delivered according to the order of their arrivals. The mailbox becomes the bottleneck in order to accommodate a large number of flows. We thus propose a dynamic sharing scheme to alleviate the bottleneck and greatly enhance the scalability of the mailbox. By simulations using the real internet traffic traces, we show that with a simple flow splitter mechanism restraining mis-sequencing, the average packet delay using DMS is considerably lower than that of other schemes including uniform frame spreading, padded frame and the CR switch, and it is close to the ideal case without re-sequencing even when the load is very high. The results also demonstrate that the size of mailbox is in the hundreds.

关键词： optical switches communication switching Packet switching Delay Chromium Laboratories optical fiber communication optical fiber LAN Internet communications Society

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New design of chirped mirrors for femtosecond pulse compression

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Guangxue Xuebao/Acta Optica Sinica 2008年第SUPPL.期28卷 89-91页

作者： Wang, Xi Chen, Lingling Yang, Weijian Zhang, Zhigang State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing 100871 China Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing 100871 China

A novel technique of optimizing chirped mirrors is proposed. Simulation demonstrates that the residual group delay dispersion ripples of two matched chirped mirrors is less than 10 fs2 over the wavelength range of 700-1050 nm and that of three matched chirped mirrors is less than 15 fs2 over the same range. These kinds of chirped mirrors have precisely controlled group delay dispersion, which plays a critical role in the generation of ultrashort pulses and compression of few-cycle to monocycle femtosecond pulses.

关键词： Group delay

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Reliability and real-time assurance of fly-by-light network for flight control system

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Guangxue Xuebao/Acta Optica Sinica 2008年第SUPPL. 2期28卷 196-200页

作者： Luo, Jiarong Luo, Xuan He, Hao Jin, Yaohui Huang, Haoyi Wu, Jianmin State Key Laboratory on Fiber-Optic Local Area Network and Advanced Optical Communication Systems Shanghai Jiaotong University Shanghai 200240 China National Defense Science and Technology Key Laboratory for Avionics System Integration Technology Shanghai 200233 China

A survey is made on several traditional topologies of fly-by-light(FBL) network. Based on the comparison of their reliability and real-time performance, a mesh optical switching network topology with 256 nodes is chosen. The redundancy topology gives the ability to sustain 3 link faults, which assures the reliability of network. The seriousness of the network failure can be measured by the number of link faults. And when several link faults occur at the same time, it must also be measured by the contiguity degree among the faults. A simulation is taken to test the end-to-end latency under all network failure situations. The simulation results show that even when some serious fault occurs, the number of hops of the end-to-end route increases slightly. So it still meets the real-time communication requirements.

关键词： Flight control systems

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Resonance between free space light and waveguide TM mode via surface plasmon wave

Resonance between free space light and waveguide TM mode via...

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International Nano-Optoelectronics Workshop (i-NOW)

作者： Guangyuan Li Anshi Xu State Key Laboratory of Advanced Optical Communication Systems & Networks (Peking University) School of Electronics Engineering and Computer Science Peking University Beijing China

Resonance between free space light and waveguide TM mode via surface plasmon wave is reported for the first time. Simulations show that the beaming angle of the excited free space light can be controlled.

关键词： optical waveguides Indexes optical films Metals Aerospace electronics Surface waves Finite element methods

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Inbuilt-Burstification Urgency-Driven Scheduling (iBUS) Algorithm for Packet Transport in IP-over-WDM networks

Inbuilt-Burstification Urgency-Driven Scheduling (iBUS) Algo...

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IEEE International Conference on communications (ICC)

作者： A. Huang B. Mukherjee State Key Laboratory of Advanced Optical Communication Systems & Networks Peking University Beijing China Department of Computer Science University of California Davis CA USA

With emerging applications in packet-transport networks such as IP-over-WDM networks (e.g., eBanking), packets need to be delivered within a bounded delay (i.e., given deadlines) with high probability. To satisfy such requirement, we propose an Inbuilt-Burstification Urgency-driven Scheduling (iBUS) Algorithm in IP-over-WDM networks. In this approach, packets are assembled into bursts according to their destinations by a preset timer. The timing burstification can reduce the amount of contentions, and support deadline constraints. Then all assembled bursts need to be scheduled efficiently with the deadline constraint. We introduce the concept of urgency degree as a scheduling metric. Bursts are scheduled according to their urgency degrees so that utilization of available network resources can be maximized under the constraint of deadlines. We also study a high-level variant of our algorithm, beta -iBUS, where the parameter beta is used to truncate the acceptable range of urgency degrees [0, 1] into [0, beta ] (where beta les 1) so that invalid scheduling caused by high urgency degrees can be minimized. Simulation experiments demonstrate that our proposal can achieve limited loss probabilities with the constraint of bounded delay.

关键词： Scheduling algorithm Proposals Timing Telecommunication traffic Assembly Traffic control Delay Processor scheduling Internet WDM networks

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A Two-Ring Access Network Operated by Crossbar-Enabled OLTs: Cost-Effective Robust Protection in Broadband Access networks

A Two-Ring Access Network Operated by Crossbar-Enabled OLTs:...

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optical Fiber communication (OFC) Conference

作者： Anpeng Huang Biswanath Mukherjee State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing China Department of Computer Science University of California Davis CA USA

For protecting an OLT failure or mixed failures cost-effectively in access networks, we connect two single-ring access architectures into a network by using optical crossbar switching technology in which crossbar-enab... 详细信息

ISBN: (纸本)9781557528599

关键词： Robustness Protection optical fiber networks optical network units Costs Telecommunication network reliability Proposals Computer science optical fiber communication Computer architecture

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A Clustering-Based Channel Estimation Algorithm for MLSE in optical Fiber communication systems

A Clustering-Based Channel Estimation Algorithm for MLSE in ...

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optical Fiber communication (OFC) Conference

作者： Chuanchuan Yang Feng Yang Ziyu Wang State Key Laboratory on Advanced Optical Communication Systems and Networks Peking University Beijing China Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing China

Without assuming the channel memory length is known a priori to the receiver, we propose a clustering-based channel estimation algorithm for optical fiber communication systems, which can also induce a complexity-redu... 详细信息

ISBN: (纸本)9781557528582

关键词： Channel estimation Clustering algorithms Maximum likelihood estimation optical fiber communication optical receivers optical noise Signal processing algorithms optical filters optical modulation Stimulated emission

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