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Zhang L.,Beijing University of Posts and Telecommunications | Zhang L.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Xin X.,Beijing University of Posts and Telecommunications | Xin X.,State Key Laboratory of Information Photonics and Optical Communications BUPT | And 4 more authors.
National Fiber Optic Engineers Conference, NFOEC 2012 | Year: 2012

We propose and experimentally demonstrate an ECDM-OFDM-PON with variable spreading factor (VSF), which endues the network with more flexible resource allocation. Bidirectional 9.22-Gb/s ECDM-OFDM signal with VSF are transmitted 75-km fiber successfully. © 2012 OSA.


Liu B.,Beijing University of Posts and Telecommunications | Liu B.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Xin X.,Beijing University of Posts and Telecommunications | Xin X.,State Key Laboratory of Information Photonics and Optical Communications BUPT | And 4 more authors.
2012 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference, OFC/NFOEC 2012 | Year: 2012

We propose and experimentally demonstrate a physical layer enhanced OFDM access network based on chaos scrambling. An 8.89-Gb/s 64QAM-OFDM data with Logistic mapped chaos scrambling is transmitted over 25km successfully. © 2012 OSA.


Tao J.J.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Zhang J.N.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Zhang Y.G.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Huang Y.Q.,State Key Laboratory of Information Photonics and Optical Communications BUPT | And 2 more authors.
Applied Mechanics and Materials | Year: 2013

Performance of coherent atmospheric optical communication system with heterodyne detection and LDPC codes was evaluated over atmospheric channel attenuations of which are about 20-30 dB/km. To reduce bit error and enhance the system performance LDPC code was implemented in system. Combining coherent detection and LDPC codes could reduce the received power requirement ~4 dBm at the BER of 10-9. © 2013 Trans Tech Publications Ltd, Switzerland.


Zhang W.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Zhang J.N.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Zhang Y.A.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Lu B.,State Key Laboratory of Information Photonics and Optical Communications BUPT
Applied Mechanics and Materials | Year: 2013

USB disk and UKEY are common applications of USB Mass Storage and CCID protocol and used widely in our daily life, but they are always deployed on different kinds of devices such as USB disk and UKEY. A potential application that integrates the functions of these two protocols into one device is discovered by us. In this way, we can regard a single device as a mass storage and an UKEY as well. According to this discovery, a new Mass Storage and CCID composite device is developed on IS8U192A development board. After this, several tests are made with some test tools to ensure the newly developed device is able to function well and the Mass Storage and CCID protocols are accurately implemented. © 2013 Trans Tech Publications Ltd, Switzerland.


Wang H.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Su S.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Gu R.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Ji Y.,State Key Laboratory of Information Photonics and Optical Communications BUPT
ICOCN 2015 - 14th International Conference on Optical Communications and Networks, Proceedings | Year: 2015

Time and wavelength division multiplexed passive optical networks (TWDM-PONs) have been chosen by the Full Service Access Network (FASN) group as the primary solution for next-generation passive optical network stage-2(NG-PON2). The key components in TWDM-PON are the tunable receivers and tunable transmitters at the ONU. However, most of the dynamic wavelength assignment algorithms are not considering the tuning time. In reality, wavelength tuning will limit channel utilization and increase packet delay. In this paper, we proposed a minimum wavelength tuning (MWT) scheme which is reducing the frequency of wavelength tuning. Simulation results show that MWT scheme can effectively reduce packet delay and improve the channel utilization. © 2015 IEEE.


Yu Y.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Zhang Y.G.,State Key Laboratory of Information Photonics and Optical Communications BUPT | Yuan X.G.,State Key Laboratory of Information Photonics and Optical Communications BUPT
Applied Mechanics and Materials | Year: 2013

A rapid real-time polarization measurement system was designed and implemented in this paper. The system is centered round a laptop running application developed for the purpose. The paper illustrates how to build such an excellent application with National Instruments' graphical programming language LabVIEW, a synchronized high speed multi-channels data acquisition card and some photoelectric conversion module in detail. With simple and friendly user interface, the experimental result shows that the measurement system has high computational efficiency, high precision calibration matrix, which can be efficiently utilized in experiments relating to the measurement of polarization. © (2013) Trans Tech Publications, Switzerland.

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