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作者： Xu, Yonghao Chen, Xianfeng Zhu, Yu Department of Physics State Key Lab. on Fiber Optic Loc. Area Commun. Networks and Advanced Optical Communication Systems Shangliai Jiao Tong University Shanghai 200240 China

This paper gives the simulation results on micro-diameter-scale liquid core optical fiber (LCOF) filled with different kinds of liquids. The nonlinear and group velocity dispersion (GVD) properties of the microdiameter-scale LCOF are achieved. The simulation of supercontinuum generation of LCOF is also obtained. The calculations show that LOCF can provide huge nonlinear parameter and large span of slow varying GVD characteristics in the infrared region, which have potential applications in optical commun.cations and nonlinear optics. Besides, LOCF has advantage of easy fabricating and robustness compared with silica nano-wire. © 2008 optical Society of America.

关键词： Liquids

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Electrical joint PMD compensation in direct-detection polarization- multiplexed transmission systems

Electrical joint PMD compensation in direct-detection polari...

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2008 Joint Conference of the Opto-Electronics and commun.cations Conference and the Australian Conference On optical Fibre Technology, OECC/ACOFT 2008

作者： Juhao, Li Linhua, Zhang Dechao, Zhang Fan, Zhang Zhangyuan, Chen State Key Lab. Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

We present simulation of electrical joint equalization including both DFE and Viterbi equalizer for PMD compensation in direct-detection PDM systems. The benifit of utilizing joint equalizer for dynamic polarization c... 详细信息

ISBN: (纸本)0858258072

关键词： Equalizers

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A WDM-PON architecture with NRZ/CW polarization multiplexed downstream and remodulated upstream using injection-locked FP laser

A WDM-PON architecture with NRZ/CW polarization multiplexed ...

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Network Architectures, Management, and Applications VI

作者： Li, Xinlin Hong, Cheng Li, Mingjin Zhang, Cheng Hu, Weiwei Chen, Zhangyuan State Key Lab. of Advanced Optical Communication Systems and Networks Electronics Department Peking University Beijing 100871 China

ISBN: (纸本)9780819473776

The wavelength-division multiplexing passive optical network (WDM-PON) is considered to be a promising method to overlay or upgrade the existing optical access network. A centralized WDM-PON in which the downstream wavelength is reused to modulate the upstream has been studied comprehensively, for same wavelength operation of both downstream and upstream, colorless operation and source-free of optical network units (ONU) can be realized in such systems. We propose a scheme of centralized WDM-PON with non-return-to-zero/continuous-wave (NRZ/CW)polarization multiplexed downstream and remodulated upstream using a CW injection-locked Fabry-Perot (FP) *** scheme can eliminate the crosstalk of downstream data on the upstream and get higher extinction ratio of received downstream signal. Experiment with 22.2km transmission of 10-Gb/s downstream signal and 622-Mb/s upstream signal was realized using a commercial FP laser, with power penalties of 0.2dB and 0dB respectively. 2.5-Gb/s upstream signal using an injection locked FP laser was also investigated, and 61 modes within 25.4nm span were locked with side-mode suppression ratio of above 27dB. © 2008 SPIE.

关键词： Passive optical networks

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Cost-effective WDM-PON for simultaneously transmitting unicast and broadcast/multicast data by superimposing IRZ signal onto NRZ signal

Cost-effective WDM-PON for simultaneously transmitting unica...

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2008 34th European Conference on optical commun.cation, ECOC 2008

作者： Lei, Cai Shilin, Xiao Zhixin, Liu Rongyu, Li Min, Zhu Weisheng, Hu State Key Lab. of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai 200240 China

We propose a novel WDM-PON broadcast/multicast architecture that superimposes inverse-RZ signal onto NRZ unicast signal. Multicast control is realized through extinction ratio adjustment of the NRZ signal. © 2008... 详细信息

ISBN: (纸本)9781424422289

关键词： Cost effectiveness

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Effect of laser frequency offset on optical minimum-shift keying transmission system

Effect of laser frequency offset on optical minimum-shift ke...

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optical Transmission, Switching, and Subsystems VI

作者： Chen, Han Dong, Yi He, Hao Hu, Weisheng Li, Lemin State Key Lab. of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University 800 Dong Chuan Rd Shanghai 200240 China Key Lab. of Optical Fiber Transmission and Communication Networks UEST of China Chengdu 610054 China

As a special case of continuous phase frequency-shift-keying (FSK), minimum-shift keying (MSK) exhibits some different properties compared with the traditional optical phase modulation formats, such as return-to-zero (RZ) differential-phase-shift-keying (DPSK) and differential-quadrature-phase-shift- keying (DQPSK). In this paper, we investigated the receiver performance degradation caused by laser frequency offset between laser frequency and delay interferometer (DI) phase, which is found to be the most critical impairment for the receiver performance in a practical optical phase modulated system. Results show that MSK system is about double times and six times more robust to frequency offsets than RZ-DPSK and RZ-DQPSK systems operating at the same 10Gb/s bit rate, respectively. © 2008 SPIE.

关键词： Q factor measurement

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A two-stage metro-access integrated network enabling all-optical virtual private network

A two-stage metro-access integrated network enabling all-opt...

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2008 34th European Conference on optical commun.cation, ECOC 2008

作者： Han, Yue Chang, Qingjiang Su, Yikai State Key Lab. of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China

We present a two-stage TDM/WDM metro-access integrated network with all-optical VPN across different sub-PONs. This feeder-ring with access-trees based architecture is employed to provide VPN service covering a wider ... 详细信息

ISBN: (纸本)9781424422289

关键词： Virtual private networks

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Generation and transmission of 86 Gbit/s hybrid polarization-division multiplexed OOK/DPSK signal

Generation and transmission of 86 Gbit/s hybrid polarization...

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optical Transmission, Switching, and Subsystems VI

作者： Wu, Lin Li, Mingjin Luo, Yazhi Zhang, Fan Chen, Zhangyuan Xu, Anshi State Key Lab. of Advanced Optical Communication Systems and Networks School of Electronic Engineering and Computer Science Peking University Beijing 100871 China

86 Gbit/s hybrid polarization multiplexed OOK/DPSK signal is generated and transmitted at the same wavelength. Clear eye diagrams of demultiplexed OOK and DPSK signals are obtained after transmission over a 106.5 km S... 详细信息

关键词： Amplitude shift keying

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Requirement of modulation bandwidth for 100Gb/s optical DQPSK transmission using one dual-drive Mach Zehnder modulator

Requirement of modulation bandwidth for 100Gb/s optical DQPS...

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optical Transmission, Switching, and Subsystems VI

作者： Liu, Dawei Wang, Liangxing Dong, Yi Chen, Han He, Hao Hu, Weisheng State Key Lab. of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University 800 Dong Chuan Rd Shanghai 200240 China

This paper demonstrates bandwidth requirement for optical DPQSK transmitter using one Dual-drive Mach Zehnder Modulator (DDMZM) for 100Gb/s physical transmission. The result shows that at receiver bandwidth of 40GHz, NRZ-DQPSK signal requires 60GHz modulation bandwidth at least, while RZ-DQPSK scheme demands less bandwidth, about 40GHz for 50% duty cycle RZ-DQPSK signal. © 2008 SPIE.

关键词： Light modulators

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Loss cumulate generating function inference and application in wireless sensor network

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Journal of Computational Information systems 2008年第4期4卷 1399-1407页

作者： Li, Yongjun Ji, Wenli Dai, Yafei Computer Networks and Distributed Systems Laboratory Peking University Beijing 100871 China School of Computer Science Northwestern Polytechnical University Xi'an 710072 China School of Communication Engineering Xi'an University of Science and Technology Xi'an 710075 China State Key Lab. for Adv. Opt Commun. Syst. and Networks Beijing 1000871 China

The internal link loss characteristic inference has become an increasingly important issue for operating and evaluating a wireless sensor network. Due to the inherent stringent bandwidth and energy constraints of sensors, it is usually impractical to directly monitor each node or link in wireless sensor network. We consider the problem of inferring the internal link loss characteristics from passive end-to-end measurement in this paper. Specifically, the link loss performance inference during the data aggregation is considered. Under the assumptions that the link losses are mutually independent, we elab.rate a bias corrected link loss Cumulant Generating Function (CGF) algorithm. The simulation results show that the internal link loss CGF can be inferred accurately comparable to the sampled internal link loss CGF. At the end of this paper, we apply the result of internal link loss CGF inference to identify the lossy link in sensor network.

关键词： Sensor nodes

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Simultaneous transmission of high-speed point-to-point data and double broadcast services in a WDM-PON system with source-free ONUs

Simultaneous transmission of high-speed point-to-point data ...

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optical Transmission, Switching, and Subsystems VI

作者： Chang, Qingjiang Huang, Mingfang Su, Yikai State Key Lab. of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China School of Electrical and Computer Engineering Georgia Institute of Technology GA 30332 United States

We propose that double broadcast services can be overlaid over high-speed point-to-point downlink data in a WDM-PON with source-free optical network units (ONUs). In the optical line terminal (OLT), a set of single-drive MachZehnder modulators (MZMs) are driven by downlink point-to-point data to generate a differential phase-shift keying (DPSK) format. The downlink DPSK signals from different wavelengths are multiplexed and then fed to a following dual-parallel MZM (DPMZM) as a double broadcast services transmitter. The broadcast service-l is an optical carrier suppression (OCS) format, while the broadcast service-2 is an inverse return-to-zero (IRZ) forma. After the transmission, at each ONU, the optical signals are separated by an optical filter. The filtered OCS signal is detected to retrieve the broadcast service-1. The DPSK/IRZ signals are split into three parts, one part is detected by an IRZ receiver to recover the broadcast service-2, the second part is detected by a DPSK receiver to retrieve the downlink data and the third part is re-modulated by the upstream amplitude shift keying (ASK). We also perform an experiment to verify the feasibility of the proposed scheme, where the power penalties of less than 1.5 dB are obtained after 25-km transmission with 1.25-Gb/s data rate. © 2008 SPIE.

关键词： Digital storage

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