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Generation of coherent optical multi-carriers using concatenated,dual-drive Mach-Zehnder and phase modulators

中国光学快报（英文版） 2012年第7期10卷 17-21页

作者： Shumin Zou Yiguang Wang Yufeng Shao Junwen Zhang Jianjun Yu Nan Chi State Key Laboratory of ASIC and System Department of Communication Science and EngineeringFudan UniversityShanghai 200433China

The generation of coherent optical subcarriers based on a concatenated dual-drive Mach-Zehnder intensity modulator (IM) and two phase modulators (PMs) is proposed and experimentally *** modulation index and DC bias of PM+IM modulation are theoretically *** analysis and numerical study are also carried out to examine the proposed *** use 25-GHz RF synchronous sinusoidal signals to drive cascaded two-stage PMs and IM,through which we generate 28 subcarriers with peak power fluctuations less than 4 *** measured tone-to-noise ratio of the subcarrier is higher than 40 *** experimental results show that for 100-Gb/s polarization multiplexing QPSK signal,the receiver sensitivity of the back-to-back signal is -28.6 dBm,and the power penalty is lower than 1 dB after 100-km transmission at the BER of 1×10-9.

关键词： 060.1660 Coherent communications 060.2330 Fiber optics communications 060.2380 Fiber optics sources and detectors

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Slow-light optical buffers based on a ring resonator and an OFDM transmitter

Slow-light optical buffers based on a ring resonator and an ...

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2012 17th Opto-Electronics and communications Conference, OECC 2012

作者： Zhu, Jiangbo Zhang, Ziran Zou, Shumin Chi, Nan Yu, Siyuan State Key Lab. of ASIC and System And Department of Communication Science and Engineering Fudan University Shanghai 200433 China Department of Electronic and Electrical Engineering University of Bristol Bristol United Kingdom

We propose a novel scheme to realize large group delay in a single ring resonator with an OFDM transmitter. The fundamental trade-off between transmission bandwidth and delay can be addressed with this new buffer. ... 详细信息

ISBN: (纸本)9781467309776

关键词： Orthogonal frequency division multiplexing

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Cover Picture: Resistance-Switchable Graphene Oxide–Polymer Nanocomposites for Molecular Electronics (ChemElectroChem 3/2014)

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ChemElectroChem 2014年第3期1卷 477-477页

作者： Prof. Dr. Gang Liu Prof. Dr. Yu Chen Prof. Dr. Run-Wei Li Dr. Bin Zhang Prof. Dr. En-Tang Kang Cheng Wang Dr. Xiaodong Zhuang Key Lay for Advanced Materials Institute of Applied Chemistry East China University of Science and Technology Shanghai 200237(PR China) CAS Key Lab of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201(PR China) The State Key Laboratory of ASIC & System Fudan University 220 Handan Road Shanghai 200433 (PR China) Yu Chen Key Lay for Advanced Materials Institute of Applied Chemistry East China University of Science and Technology Shanghai 200237(PR China) Run-Wei Li CAS Key Lab of Magnetic Materials and Devices Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201(PR China) En-Tang Kang Department of Chemical and Biomolecular Engineering National University of Singapore Kent Ridge 119260 (Singapore) Department of Chemical and Biomolecular Engineering National University of Singapore Kent Ridge 119260 (Singapore)

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Resistance-Switchable Graphene Oxide–Polymer Nanocomposites for Molecular Electronics

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ChemElectroChem 2014年第3期1卷 478-478页

The front cover artwork is provided by Prof. Dr. Yu Chen and his co-workers. The image represents how deliberately designed, solution-processable, and electroactive polymer-functionalized graphene-oxide nanosheets can be reversibly switched ON and OFF for the development of next-generation nonvolatile information-storage applications. Read the full text of the article at 10.1002/celc.201300158 .

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FSK Modulation Scheme for High-Speed Optical Transmission

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ZTE communications 2012年第3期10卷 2-11页

作者： Nan Chi Wuliang Fang Yufeng Shao Junwen Zhang Li Tao State Key Lab of ASIC&System and Department of Communication Science and EngineeringFudan UniversityShanghai 200433China

In this paper, we describe the generation, detection, and performance of frequency-shift keying （FSK） for high-speed optical transmission and label switching. A non-return-to-zero （NRZ） FSK signal is generated by using two continuous-wave （CW） lasers, one Mach-Zehnder modulator （MZM）, and one Mach-Zehnder delay interferometer （MZDI）. An RZ-FSK signal is generated by cascading a dual-arm MZM, which is driven by a sinusoidal voltage at half the bit rate. Demodulation can be achieved on 1 bit rate through one MZDI or an array waveguide grating （AWG） demultiplexer with balanced detection. We perform numerical simulation on two types of frequency modulation schemes using MZM or PM, and we determine the effect of frequency tone spacing （FTS） on the generated FSK signal. In the proposed scheme, a novel frequency modulation format has transmission advantages compared with traditional modulation formats such as RZ and differential phase-shift keying （DPSK）, under varying dispersion management. The performance of an RZ-FSK signal in a 4 x 40 Gb/s WDM transmission system is discussed. We experiment on transparent wavelength conversion based on four-wave mixing （FWM） in a semiconductor optical amplifier （SOA） and in a highly nonlinear dispersion shifted fiber （HNDSF） for a 40 Gb/s RZ-FSK signal. The feasibility of all-optical signal processing of a high-speed RZ-FSK signal is confirmed. We also determine the receiver power penalty for the RZ-FSK signal after a 100 km standard single-mode fiber （SMF） transmission link with matching dispersion compensating fiber （DCF）, under the post-compensation management scheme. Because the frequency modulation format is orthogonal to intensity modulation and vector modulation （polarization shift keying）, it can be used in the context of the combined modulation format to decrease the data rate or enhance the symbol rate. It can also be used in orthogonal label-switching as the modulation format for the payload or the label. As an example, we p

关键词： optical communication return-to-zero frequency shift keying Mach-Zehnder modulator Mach-Zehnder delay interferometer chromaticdispersion wavelength conversion label switching

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Generation of flat and stable multi-carriers based on only integrated IQ modulator and its implementation for 112Gb/s PM-QPSK transmitter

Generation of flat and stable multi-carriers based on only i...

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Optical Fiber communication (OFC) Conference

作者： Li Tao Jianjun Yu Junwen Zhang Jiangbo Zhu Yuanquan Wang Nan Chi Department of Communication Science and Engineering and State Key Lab of ASIC & System Fudan University Shanghai China

We theoretically and numerically analyze the multi-carriers generation scheme based on only integrated IQ modulator. Flat and stable 11 carriers are obtained and 112Gb/s PM-QPSK experiment over a single subcarrier has... 详细信息

ISBN: (纸本)9781557529381

关键词： Optical modulation Radio frequency Optical amplifiers Optical filters Optical fibers Bit error rate

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Investigation of schottky junction and mos technology for 111-v compound semiconductor mosfet application 12

Investigation of schottky junction and mos technology for 11...

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12th International Workshop on Junction Technology, IWJT 2012

作者： Chen, Jun Ku, Teng-Chieh Li, Ming-Fu Chin, Albert State Key Lab ASIC and System Department of Microelectronics Fudan University Shanghai200433 China Department of Electronics Engineering Institute of Electronics National Chiao Tung University Hsinchu300 Taiwan

ISBN: (纸本)9781467312578

This paper explores two low temperature technological developments related to future n-MOSFETs using III-V semiconductors as channel materials. (1). It was found that Yb-GaAs Schottky contact with RTA at 500°C for 30s has good rectifying characteristics, low effective electron barrier height, low sheet resistivity, atomically sharp junction with GaAs. These properties are suitable for sourceldrain (SID) formation in GaAs n-MOSFETs. (2). GaAs MOS capacitors were fabricated by E-gun deposition of LaAI03 (LAO) dielectric and PVD deposition of TaN electrode. The capacitors with well-behaved CV characteristics with EOT=3nm, gate leakage currents 7.5x10-3 A/cm2 for 500°C RTA treated samples at Vfb-IV were achieved. © 2012 IEEE.

关键词： Gallium arsenide

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Companding transform for PAPR reduction in coherent optical OFDM system

Companding transform for PAPR reduction in coherent optical ...

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International Conference on Wireless and Optical communications ( WOCC)

作者： Xinying Li Li Tao Junwen Zhang Yuanquan Wang Yuan Fang Jiangbo Zhu Yiguang Wang Yufeng Shao Nan Chi Department of Communication Science and Engineering State Key Laboratory of Application Specific Integrated Circuit (ASIC) and System Fudan University Shanghai China

μ-law companding and de-companding, which enlarges small signals and compresses large signals, can work successfully in the CO-OFDM transmission system, and μ=1 is the optimal companding coefficient for PAPR reduction.

ISBN: (纸本)9781467309400;9781467309417;9781467309394

关键词： Peak to average power ratio Transforms Optical distortion Optical fibers Nonlinear optics

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A Monolithic lab-on-a-Chip for Electrochemical Detection

A Monolithic Lab-on-a-Chip for Electrochemical Detection

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2012 IEEE 11th International Conference on Solid-state and Integrated Circuit Technology(ICSICT-2012)

作者： Jianfeng Chen Yuhua Yu Sheng Yang Shih-Kang Fan Jia Zhou ASIC and System State Key Lab Department of MicroelectronicsFudan University Department of Mechanical Engineering National Chiao Tung University

This paper reports a novel monolithic lab-on-a-chip （LOC）with an electrochemical system embedded in an electrowetting on dielectric（EWOD）microfluidic device for the first *** fabrication process is compatible with IC *** chip could not only merge and transport droplets successfully,but show good electrochemical responses of glucose and glucose oxidase with the sensitivity of 0.028mA/mM and the statistic adjust R-square of 0.9549.

关键词： Microfluidics Sugar Electrodes Fabrication Gold lab-on-a-chip Dielectrics

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A new technique for ferroelectric microfluidic channels by rolling method

A new technique for ferroelectric microfluidic channels by r...

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作者： Li, Jinxing Liu, Zhaoqian Lu, Bing-Rui Huang, Gaoshan Chen, Yifang Mei, Yongfeng Liu, Ran State Key Lab of ASIC and System Fudan University Shanghai 200433 China Department of Materials Science Fudan University Shanghai 200433 China MNTC Rutherford Appleton Laboratory Chilton Didcot Oxfordshire OX11 0QX United Kingdom

Microfluidic channels on the size of tens of microns are being developed for use in a variety of applications such as microreactors, DNA analysis, and micro total analysis systems. Among the fabrication techniques for microfluidic channels, the recently-developed rolled-up method provides a great opportunity to integrate tubular channels by selective underetching and release of a strained thin film from a substrate. In this work, microfluidic channels with large diameter-to-length aspect ratios have been fabricated by a rolling method. The micro-FTIR characterization demonstrated that the functional poly(VDF-TrFE) ferroelectric polymer was engineered in the micro channel. The ferroelectric properties of the microchannels were studied by piezoresponse force microscopy (PFM). Local hysteresis measurement suggests that the microchannels show good ferroelectric properties. Fluid moving and emptying of the microfluidic channels were captured by video microscopy. © 2012 Elsevier B.V. All rights reserved.

关键词： Microchannels

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