| 1. |
- Alcusa-Saez, E. P., et al.
(författare)
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All-fiber acousto-optic tunable filter in polyimide coated optical fibers
- 2017
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Ingår i: 2017 19th International Conference on Transparent Optical Networks (ICTON). - : IEEE Computer Society. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- We present the experimental demonstration of in-fiber acousto-optic coupling in a polyimide-coated optical fiber. Although the presence of the polyimide coating increases is significantly the attenuation of the acoustic wave, we show that acousto-optic interaction can still be produced with reasonable efficiency. The effect of the polyimide coating on the acousto-optic interaction process is analyzed in detailed. Theoretical and experimental results are in good agreement. To our knowledge, this is the first experimental demonstration of acousto-optic coupling in optical fibers with robust protective coating.
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| 2. |
- da Silva, Carlos Natalino, et al.
(författare)
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Assessing the effects of physical layer attacks on content accessibility and latency in optical CDNs
- 2017
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Ingår i: 19th International Conference on Transparent Optical Networks (ICTON). - Girona, Spain : IEEE conference proceedings. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- Content Delivery Networks (CDNs) are a major enabler of large-scale content distribution for Internet applications. Many of these applications require high bandwidth and low latency for a satisfactory user experience, e.g., cloud gaming, augmented reality, tactile Internet and vehicular communications. Replication is one of the most prominent solutions to meet the requirements of latency-sensitive applications. However, infrastructure disruptions can greatly degrade the performance of such applications, or even cease their proper execution. The extent of degradation can be exacerbated by malicious attackers that target the critical elements of the CDN physical infrastructure to disconnect or severely degrade services.
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| 3. |
- Furdek, Marija, 1985-, et al.
(författare)
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Survivable manycast, anycast and replica placement in optical inter-datacenter networks
- 2017
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Ingår i: 2017 19th International Conference on Transparent Optical Networks (ICTON). - : IEEE Computer Society. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- Inter-datacenter networks need to support datacenter communication with the end-users, as well as content replication and synchronization between datacenters in a reliable manner. This paper presents a survivable manycast, anycast and replica placement strategy for optical inter-datacenter networks resulting in reduced overall network resource consumption.
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| 4. |
- Kores, Cristine Calil, et al.
(författare)
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Frequency and linewidth dependence of distributed-feedback resonators on thermal chirp
- 2017
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Ingår i: 2017 19th International Conference on Transparent Optical Networks (ICTON). - : IEEE Computer Society. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- We present an analysis of the spectral characteristics of distributed-feedback (DFB) laser resonators with thermally chirped distributed mirrors. Such DFB resonators have the interesting capability of producing a linewidth as narrow as a few kHz. The investigated devices are ytterbium-doped amorphous Al2O3 channel waveguides with a periodic Bragg grating inscribed into its SiO2 top cladding. The resonance in the spectral response of the resonator results from a distributed λ/4 phase-shift produced by increasing the waveguide width. Its frequency is determined by the period of the Bragg grating, whereas its linewidth is determined by the intrinsic losses and the outcoupling losses of the resonator. When such a device is optically pumped to achieve gain and eventually lasing, the grating period becomes thermally chirped, thereby influencing the spectral characteristics of the resonator. We investigate experimentally and via simulations the frequency and linewidth of the resonance in the presence of a thermally induced linear chirp on the grating profile. Experiments and simulations show good quantitative agreement.
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| 5. |
- Licciardello, M., et al.
(författare)
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Performance evaluation of abstraction models for orchestration of distributed data center networks
- 2017
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Ingår i: 2017 19th International Conference on Transparent Optical Networks (ICTON). - : IEEE Computer Society. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- Cloud computing is increasingly based on geographically distributed data centers interconnected by high performance networks. Application of Software Defined Networking (SDN) is studied as an emerging solution to support dynamic network resource management for distributed data centers (DCs) jointly with extensive use of Network Function Virtualization (NFV). SDN/NFV operation takes advantage of orchestration of network control functions according to distributed DCs communication needs. Orchestration relies on a set of logical information related to the underlying infrastructure, called abstraction, which offers different levels of visibility of available resources, depending on the abstraction strategy adopted.
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| 6. |
- Lin, Rui, et al.
(författare)
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Physical-layer network coding for passive optical interconnects in datacenter networks
- 2017
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Ingår i: 2017 19th International Conference on Transparent Optical Networks (ICTON). - : IEEE Computer Society. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- We introduce physical-layer network coding for a passive optical interconnect architecture in datacenter networks. Results reveal that half of the wavelengths can be saved to obtain latency in the magnitude of microseconds.
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| 7. |
- Rak, Jacek, et al.
(författare)
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Disciplines and measures of information resilience
- 2017
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Ingår i: ICTON 2017 - 19th International Conference on Transparent Optical Networks 2-6 July 2017, Girona, Catalonia, Spain. - Piscataway : IEEE. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- Communication networks have become a fundamental part of many critical infrastructures, playing an important role in information delivery in various failure scenarios triggered e.g., by forces of nature (including earthquakes, tornados, fires, etc.), technology-related disasters (for instance due to power blackout), or malicious human activities. A number of recovery schemes have been defined in the context of network resilience (with the primary focus on communication possibility in failure scenarios including access to a particular host, or information exchange between a certain pair of end nodes). However, because end-users are becoming more and more interested in information itself (regardless of its physical location in the network), it is appropriate to complement the well-defined framework of network resilience with one that addresses information resilience, and to introduce definitions of relevant disciplines and measures, as proposed in this paper. © 2017 IEEE.
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| 8. |
- Sköldström, Pontus, et al.
(författare)
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DISMI - An intent interface for application-centric transport network services
- 2017
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Ingår i: International Conference on Transparent Optical Networks. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- Application-centric networking is a novel approach to construct transport networks that allows application-specific requirements to be taken into account through the entire service provisioning process: the service offered to each application is differentiated at each layer of the transport network, from IP to optical. This approach replaces the grooming of traffic with different requirements into a shared path in the transport layer, and allows for a finer control and utilization of network resources by network operators. To make this concept viable, an interface for requesting a connectivity service by applications requires an abstraction with respect to the various underlying network technologies. Interfaces based on the concept of Intents provide such an abstraction: applications can describe what they need from the network (their requirements) rather than how to achieve them. This paper describes the design and implementation of the solution we propose: DISMI, the Intent-based North-Bound Interface of a network controller.
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| 9. |
- Sköldström, Pontus, et al.
(författare)
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Making powerful friends : Introducing ONOS and Net2Plan to each other
- 2017
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Ingår i: International Conference on Transparent Optical Networks. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- In this paper, we present our efforts for integrating network control and network planning, connecting the popular open-source ONOS control platform with Net2Plan, an open source network planner. The integration allows ONOS to use Net2Plan, combined with our resource allocation framework, as an on-line network optimization tool, calculating and re-routing paths as new requests arrive. It also lets Net2Plan obtain an up-to-date topology from ONOS. Net2Plan can then use the topology and our algorithms to perform planning operations such as investigating hypothetical questions about consequences of network failures or additional network equipment. The interface also lets the paths computed by the algorithms running on Net2Plan to be transferred to ONOS and implemented in the running network. While we currently only support IP/Optical networks, additional layers could easily be incorporated. As an interesting side-effect, code used for network simulation can be instrumented and applied to the real network.
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| 10. |
- Thylén, Lars, et al.
(författare)
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Integrated nanophotonics for information technologies and sensors : Ways to solve the present gridlock in performance
- 2017
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Ingår i: 2017 19th International Conference on Transparent Optical Networks (ICTON). - : IEEE Computer Society. - 9781538608586
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Konferensbidrag (refereegranskat)abstract
- The decades long development in shrinking footprint and improving performance of photonics integrated circuits has seemingly slowed down in recent years, posing problems in e g interconnects in data centers with their ever increasing power requirements. Thus, routes to a continued development towards smaller footprint, lower power, higher performance integrated nanophotonics will be presented and discussed. Comparison to some nanoelectronics devices will be made.
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