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Study on Optical Virtual Private Networks in a Wavelength Division Multiplexing Passive Optical Network

Author: YaoQiongBo
Tutor: LiuFengQing
School: Nanjing University of Posts and Telecommunications
Course: Optical Engineering
Keywords: WDM Passive Optical Network Optical Virtual Private Network An arrayed waveguide grating Remodulation A reflection-type semiconductor optical amplifier
CLC: TN929.1
Type: Master's thesis
Year: 2012
Downloads: 16
Quote: 0
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Abstract


With the rapid development of optical access network , the number of users and bandwidth demands continue to increase , and may be required to provide a variety of direct communication services for users in the same PON , such as high -definition video conference call , and WDM-PON has higher receiver sensitivity , huge bandwidth and transparent transfer protocol is one of the next-generation optical access mainstream technology . Therefore, the study has important theoretical and practical significance in how to build the WDM-PON Optical Virtual Private Network . In this paper, the WDM-PON optical virtual private network services . First, traditional PON architecture ONU communication after OLT must deal with this shortcoming , this paper proposes a new OVPN network structure of the program , the transformation of the original program by using an array waveguide grating ODN ONU-ONU direct communication. Compared with the traditional ONU-ONU communication , reduce the network interconnect delay , increase the security of the communication , but also improve the wavelength utilization , and at the same time has a higher network survivability and better anti-interference ability . Simulation analysis shows that when the system bit error rate of 1 × 10 -9 < / sup > and how signals coexist , the receiving end of the power penalty of only 0.5dB, show that the system has better anti- crosstalk . Then pointed out the existing problems in the original proposal , through to analyze existing ONU colorless programs and re- modulation technique downlink transmission of the original program and ONU end design based on RSOA aura back to re - modulation scheme the achieve the ONU colorless . Compared to the original proposal to simplify the construction and maintenance of the network , reduce the cost of operation and maintenance of the equipment . Simulation to verify the feasibility of the improvement program in cost budget allows , in the ODN by simply adding an EDFA can make the system re-modulated signal BER performance improve 3.4dB .

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