Optical Ring Architecture Research Articles

Optical network on chip: design of wavelength routed optical ring architecture

Network on chip (NoC) technology has now achieved a mature stage of development as a result of their use as a key component in many successful commercial devices. As multiprocessors continue to scale, these ship based electronic networks are more challenging to meet their power budget communication requirements. Innovative technology is emerging with the aim of offering shorter latencies and greater bandwidth with lower power consumption. Ring topology provides superior results among the all wavelength routed topologies in the chip optical network. In this paper, we proposed an optical ring network-on-chip (ORNoC) architecture which is contention free. Communication matrix is used to assign a single waveguide/wavelength pair to implement simultaneous communications. The design constraints for the proposed architecture will be wavelength reused on a single waveguide for multiple communications. We imply automatic wavelength/waveguide assignment for effective design and will prove that the proposed architecture can connect more number of nodes and less wavelengths per waveguide.

Optical Ring Architecture Performance Evaluation using Ordinary Receiver

Wavelength division multiplexing is an accepted technique to exploit the fiber bandwidth in metro network. Designing innovative architectures for metro network often means finding cost effective combinations of electronic and optic technologies and new network paradigms suited for constraints caused by available photonic components and subsystems. The three different and architectures included in this project the bulk of raw data in the optic domain while the implementation of the complex network formation is in the electronic domain. All the three ringO architectures perform λ monitoring. The basic ringO architecture is based on WDM fiber ring. The three ring architectures are designed and simulated using OptSim 5.3 software.

Optical Ring Architecture Performance Evaluation using Ordinary Receiver

Wavelength division multiplexing is an accepted technique to exploit the fiber bandwidth in metro network. Designing innovative architectures for metro network often means finding cost effective combinations of electronic and optic technologies and new network paradigms suited for constraints caused by available photonic components and subsystems. The three different and architectures included in this project the bulk of raw data in the optic domain while the implementation of the complex network formation is in the electronic domain. All the three ringO architectures perform λ monitoring. The basic ringO architecture is based on WDM fiber ring. The three ring architectures are designed and simulated using OptSim 5.3 softwareKeywords: PON, Ring Topology, Node Architecture, Photodiode Array, LASER Array.

A Fully Optical Ring Network-on-Chip with Static and Dynamic Wavelength Allocation

As the number of IPs (processor, memory) integration on a chip increases, chip multicore processors (CMPs), and system-on-chips (SoCs) will require high performance and low power consumption interconnection infrastructure. Traditional electronic network-on-chip (NoC) faces several problems, such as limited bandwidth, crosstalk, impedance mismatch, and huge power dissipation. To alleviate these challenges, optical NoCs have emerged as an attractive solution. Optical interconnects take advantage of light, and the multiple wavelengths within a single optical link (waveguide) to achieve high communication bandwidth at low power consumption cost. Toward this work we aim to propose a cost-performance and power efficient NoC. First, we proposed a low latency path setup network for conventional hybrid electronic-photonic Torus NoC using predictive switching. By lowering the path setup latency, we could achieve a considerable performance improvement. Second, a new hybrid architecture formed of an optical ring and electrical crossbar (OREX) has been proposed. OREX reduces the path setup network to a single electrical crossbar. Its optical network uses a ring topology more adapted for photonic interconnects. Using a cycle accurate simulator, our results show that OREX further improves hybrid electronic-photonic NoCs performance. Finally, to reduce power consumption, we have proposed a fully optical ring architecture. The proposed architecture combines static and dynamic wavelength allocation in the same network to fully take advantage of the low power and high performance optical interconnects. A different wavelength-channel is statically allocated to each destination node for light weight communication. Contention of simultaneous communication requests from multiple source nodes to the destination is solved by a token based arbitration. For heavy load communication, a shared multiwavelength-channel is available by requesting it in execution time from source node to a special node that manages dynamic wavelength allocation. Our architecture takes advantage of both wavelength allocation mechanisms by selecting the adequate one, depending on iv communication message sizes (baseline) and network congestion information (contention based and smart selection). Preliminary hardware cost comparison with several photonic architecture shows that our architecture can be an attractive costperformance interconnection infrastructure for future SoCs and CMPs. We further discuss performance of the proposed fully optical ring NoC architecture based on simulation using a photonic network simulator. Results show that our architecture allows considerable reduction of the network energy consumption compared to conventional hybrid NoCs and show reasonable bandwidth and latency performance using probabilistic traffic patterns.

Performance evaluation of a WDM metropolitan network: A virtual prototyping approach

We present a generic low-cost and flexible metropolitan area network optical ring architecture and evaluate its performance using optical transmission simulation software. We describe a specific design method that can be used to extract relevant parameters, such as the BER and OSNR for different channels at any ring network node. We show the possibility offered by a personal computer in the physical modeling of a complex system consisting of numerous components with many parameters. The design method that we describe can be considered as an efficient virtual prototyping method, offering cost and timesavings to network planners.

Architecture and design of optical channel protected ring networks

In this paper, different optical ring architectures are considered and the optical add/drop multiplexer (OADM) functional architecture is described. In addition, different aspects of ring network design and their impact on the network architecture are discussed.

Full-duplex fiber-optic RF subcarrier transmission using a dual-function modulator/photodetector

An electroabsorption waveguide device is presented as a dual-function modulator/photodetector for application as a cost-effective full-duplex transceiver in radio-frequency (RF) fiber-optic links. The spectral modulation and detection properties of the dual-function transceiver are characterized experimentally. Extinction ratio, insertion loss, and responsivity are 12 dB, 7 dB, and 0.8 A/W, respectively. Modulation and detection bandwidths are both in excess of 17 GHz. By employing a dual-lightwave technique, optimum modulation and detection performance is simultaneously achieved. Furthermore, full-duplex error-free optical transmission of RF subcarrier-multiplexed signals over 10 km nondispersion shifted single-mode fiber is demonstrated and a point-to-multipoint optical ring architecture is proposed.