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Optical receiver module based on multiple optical orthogonal codes optical label

Author: HeYin
Tutor: QiuKun
School: University of Electronic Science and Technology
Course: Optical Engineering
Keywords: Optical Packet Switching Multiple optical orthogonal codes Optical label Optical label receives
CLC: TN929.11
Type: Master's thesis
Year: 2009
Downloads: 44
Quote: 1
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Abstract


Optical packet switching technology with high-speed, transparent data rate and format, and can adapt to the rapid changes in the network environment is flexible and reconfigurable characteristics, is an important part of the most effective ways to achieve seamless connectivity of high-speed optical transmission and all-optical network. The light labels carry the packet payload routing information, optical label processing technology is a key technology in optical packet switching and optical packet switching premise. The study analyzed the existing optical label modulation: bit sequence tags, wavelength label, subcarrier label, the label of quadrature modulation, optical code label performance characteristics. The number of needle in the label in the form of single OOCs light, it can allow the user greatly limits the capacity of optical packet switching (OPS) system margin. We propose a multi-label form of optical orthogonal codes and optical orthogonal codes (OOC) serial arrangement of the new label format optical packet switching technology in the form of optical label using the the OOC sequence of combinations to solve a the OOC code word number less problems. The key technologies: the packet switching system, the optical label generation, optical label received, the core of the control unit module implementation method. Because there are non-continuous, long with the case of the \If the use of traditional optical receiver is not working properly, we analyze the composition of the traditional receiver principle, the receiver can not work in the system of the reasons, by the experimental verification. System for the packet-switched network, we propose a receiver module design based on multiple optical orthogonal codes light label. Based on multiple optical orthogonal codes in optical packet switching systems, optical label signal the Triple OOCs rate 500MHZ. When the packet arrives at the label receiving module to light, first enter the FBG decoder, the optical label matching optical decoder will generate mutual correlation noise auto-correlation peak, the light does not match the decoder output. After photoelectric conversion are the pulse width of 2ns, 2mv peak of the analog signal, and if you want to direct the signal fed to the core node for processing, the core node is completed by an FPGA routing table lookup, the cost is greatly increased, because FPGA the internal clock is not on the 500MHz signal sampling processing, and so fed to the the FPGA core processing unit before the tag signal processing. So that we are able to select the higher cost FPGA chip to complete the routing table lookup of the label signal. Therefore, we designed the pulse broadening and amplifying circuit cascade-based optical label processing module. Designed by FPGA implementation tag identification unit - to complete the tag signal sampling discriminant to determine the legitimacy of the label. Finally, we label rate of 500Mhz, payload rate of 1.28Gb / s optical packet switching experiments have been satisfied with the results.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications > Optical fiber communication
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