Trigonometric Transforms for High-Speed Optical Networks: All-Optical Architectures and Optical OFDM

Orthogonal Frequency Division Multiplexing (OFDM) is a modulation technique which is now used in most new and emerging broadband wired and wireless communication systems such as standard 802.11a/b/g/n, Digital Video Broad casting Television (DVB-TV), and Long Term Evolution (LTE) in the next mobile generation, due to its capacity in solving the problems of Inter-Symbol Interference (ISI) caused by the effects of the dispersive channel. Very recently researches focus on applying OFDM technology in optical fiber communication systems. Optical OFDM is well suited for high speed transmission systems with high spectral efficiency and attracted significant attention from the optical communication community. One of the major issues that degrade the performance of optical OFDM networks is its fiber non-linearity. Fiber non-linearities represent the fundamental limiting mechanisms to the amount of data that can be transmitted on a single optical fiber. Non-linear effects arise as optical fiber data rates, transmission lengths, number of wavelengths, and optical power level increases. Therefore, the effect of non-linearity in high data rate optical networks needs to be controlled to enhance link performances. In this paper, a nonlinearity compensation technique (Hermitian Symmetry) is implemented to improve the performance of OFDM based optical networks. This would provide high spectral efficiency, low ISI and very good Bit Error Rate (BER) performances without increasing the complexity of the network. The optical OFDM transmission system with fiber non-linearity compensation is simulated using Virtual Photonics Integrated (VPI) software.

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Devices, communication techniques and networks for all optical communication: research issues

Journal of Optical Communications ◽

10.1515/joc-2020-0276 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Vikas Kaushik ◽

Himanshi Saini

Keyword(s):

Optical Networks ◽

Communication Networks ◽

Optical Communication ◽

High Speed ◽

Research Issues ◽

Communication Techniques ◽

Communication Technique ◽

All Optical ◽

High Speed Data ◽

Further Development

Abstract The characteristics of all optical networks such as high speed, data carrying capacity and transparency make them suitable for emerged networks domain. This paper presents an overview of research challenges in the field of all optical communication networks. Various subdomains of an all optical system, for example device-level designs, communication technique-level designs and network-level designs have been extensively investigated and presented in this paper. Further, the related research issues under each category of these domains have been discussed. These issues constitute the basic criterion for further development in all optical domain.

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A Flexible All-Optical OFDM Network Coding Architecture for multicast in Elastic Optical Networks

Asia Communications and Photonics Conference 2013 ◽

10.1364/acp.2013.af2f.30 ◽

2013 ◽

Cited By ~ 1

Author(s):

Lijun Li ◽

Rentao Gu ◽

Yuefeng Ji ◽

Lin Bai ◽

Zhitong Huang

Keyword(s):

Network Coding ◽

Optical Networks ◽

All Optical ◽

Optical Ofdm

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A Flexible All-Optical OFDM Network Coding Architecture for multicast in Elastic Optical Networks

Asia Communications and Photonics Conference 2013 ◽

10.1364/acpc.2013.af2f.30 ◽

2013 ◽

Cited By ~ 1

Author(s):

Lijun Li ◽

Rentao Gu ◽

Yuefeng Ji ◽

Lin Bai ◽

Zhitong Huang

Keyword(s):

Network Coding ◽

Optical Networks ◽

All Optical ◽

Optical Ofdm

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All-Optical Resilient Pulse-Position-Modulation-Based Packet-Switched Routing

Resilient Optical Network Design ◽

10.4018/978-1-61350-426-0.ch005 ◽

2011 ◽

pp. 109-133

Author(s):

Z. Ghassemlooy ◽

W. P. Ng ◽

H. Le Minh

Keyword(s):

Optical Networks ◽

High Speed ◽

Packet Switching ◽

Building Blocks ◽

Network Resilience ◽

Switching Networks ◽

Routing Table ◽

All Optical ◽

Packet Switching Networks ◽

The Look

In traditional optical networks, configured as static physical pipes, the carrier-grade network resilience is provided by means of protection and restoration capabilities. However, there is a need to develop a new generation of dynamic reconfigurable all optical networks with built in network resilience capabilities. In the next generation, high-speed photonic packet switching networks, ultrafast packet header processing, and packet switching are the vital building blocks. In this chapter, a review of different routing schemes for high-speed photonic packet switching networks and the concept of reducing the size of the look-up routing table are presented. A novel PPM signal format has been introduced in order to reduce the size of the routing table in order reduce packet switching and processing time compared to the conventional routing tables. A failure self detection and a routing table reconfiguration in the optical domain are introduced, and a number of factors such as system performance, reliability, and complexity are also discussed.

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Optical Burst Switching

Encyclopedia of Internet Technologies and Applications ◽

10.4018/978-1-59140-993-9.ch053 ◽

2008 ◽

pp. 375-382

Author(s):

Kyriakos Vlachos

Keyword(s):

Optical Networks ◽

High Speed ◽

Random Access ◽

Optical Burst Switching ◽

Circuit Switching ◽

Burst Switching ◽

Optical Circuit ◽

All Optical ◽

Store And Forward ◽

Optical Burst

Switching in core optical networks is currently being performed using high-speed electronic or all-optical circuit switches. Switching with high-speed electronics requires optical-to-electronic (O/E) conversion of the data stream, making the switch a potential bottleneck of the network: any effort (including parallelization) for electronics to approach the optical speeds seems to be already reaching its practical limits. Furthermore, the store-and-forward approach of packet-switching does not seem suitable for all-optical implementation due to the lack of practical optical Random-Access-Memories to buffer and resolve contentions. Circuit switching on the other hand, involves a pre-transmission delay for call setup and requires the aggregation of microflows into circuits, sacrificing the granularity and the control over individual flows, and is inefficient for bursty traffic. Optical burst switching (OBS) has been proposed by Qiao, C., ?[1] to combine the advantages of both packet and circuit switching and is considered a promising technology for the next generation optical internet.

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Physical Layer Security Solutions for High Speed Data Networks

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.2514 ◽

2013 ◽

Vol 712-715 ◽

pp. 2514-2520

Author(s):

Zhi Jie Mao ◽

Jiang Tao Wei ◽

Hong Wei Li ◽

Qiong Wu ◽

Feng Chen Qian

Keyword(s):

Optical Networks ◽

High Speed ◽

Random Sequence ◽

Random Noise ◽

Physical Layer ◽

Data Mapping ◽

High Data ◽

Optical Security System ◽

All Optical ◽

Noise Function

To improve the confidentiality and availability of the network, it is important to provide multilevel security in the physical layer of optical networks. Based on the orthogonal characterization of OFDM, we introduce a new electronic encryption method for the encryption of the subcarriers symbols after data mapping. Since all-optical networks are emerging as implementations for very high data rate communications, flexible switching and broadband application support, we present a novel all-optical security system technique using random sequence encryption. The noise function was applied via a pseudo-random noise generator seeded with an encryption key. We analyze the performance of both security systems under different application circumstances. Our results confirm the effectiveness of the security technique to make the system less vulnerable to attack.

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