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We compare recently reported techniques that enable flexible coding and modulation in coherent optical systems. We focus on methods that are feasible to incorporate in next generation DSP ASICs within two to three years.
Today's large scale data center networks are both massively scalable and highly resilient, typically using custom designed software and hardware. What factors drive the design, and how will they develop in the future?
OCP Network: Why does Facebook build network hardware and software? A radical approach to managing large-scale networks and its' impact on network architecture and technology.
The communication industry must adapt to deal with SDN which is set to rewrite the book of networking. However, the main question remains if SDN improves the security or it makes such networks more vulnerable.
Generation of optical frequency combs using Silicon-based photonics offers the potential for highly robust, compact, low-power devices for a wide range of applications in time and frequency metrology, sensing, spectroscopy, and communications.
In this talk, we review recent research progress in twisted communications using orbital angular momentum (OAM). Basic concepts, key devices and techniques, free-space and fiber-based transmission links, and grooming functionalities of OAM communications are discussed.
Cloud networking bandwidth demand continues to surge. New technologies and architectures are required to meet this demand in an economically viable manner. The evolution of DC interconnect technologies and architectures are examined. Issues around disaggregation vs vertical integration and network virtualization are discussed.
Substantial advances in the modeling of non-linear fiber propagation have recently been made. Advantages and limitations of various proposed models are outlined and discussed. The still open problems and future challenges, including non-linearity mitigation, are discussed.
Despite market demonstrations, SDN software and standards have signficant gaps that prevent pervasive deployments, especially in the WAN. This presentation presents the state and key challenges that need to be addressed.
Silicon photonics based VOAs (variable optical attenuators) have been manufactured for the past several years in quantities of 100,000s per year. How do the lessons of high-volume VOA production apply to 100Gb/s transceivers as the volumes also scale beyond 100k per year?
Using Ethernet in the fronthaul can deliver the statistical multiplexing gains offered by the new functional splits proposed for the radio access network, but latency and delay variations are challenges that must be overcome.
For giant cloud players, the optical network is the basic solution for Data Center Interconnection (DCI). In this talk, I will discuss the optical DCI concerns and trends in my mind, basing on my experience as an optical network architect in Alibaba and Dahoo.
The cable industry has been deploying fiber optic cable for over 25 years, running triple play bundled service for most of those years. The industry has also been deploying fiber-to-the-premises to commercial customers for many years. And, with respct to residential fiber, MSOs have taken a lead role in defining next generation EPON standards as part of the IEEE 803.xyz activities and developed SCTE...
In this talk, we review recent research progress in twisted communications using orbital angular momentum (OAM). Basic concepts, key devices and techniques, free-space and fiber-based transmission links, and grooming functionalities of OAM communications are discussed.
With the recent conclusion of the NG-PON2 standards in the ITU-T, the fiber access industry is now considering where to go next. This paper reviews some of the options for the evolution of passive optical networks.
We describe the generation of low-noise optical and microwave signals via Kerr and Brillouin nonlinearities in high-quality-factor optical microresonators. Applications to clocks, timing, communications and sensing are discussed.
Software-Defined Networking (SDN) and Network Functions Virtualization (NFV) have recently caught attentions from industries as technologies for reducing capital expense (CAPEX) and operational expense (OPEX), where software-defined programmable network equipment dispenses with high maintenance cost of hardware appliances and enables rapid revisions of functionalities and the automation of operation...
We propose and experimentally demonstrate a novel bidirectional modulation format converter that can simultaneously phase multiplex and de-multiplex PSK signals between QPSK and BPSK formats all-optically by employing four-wave mixing (FWM) in a single HNLF.
The present canonical design of the semiconductor laser (SCL), in force since The early 1970s, is incompatible with high coherence (narrow linewidth). The reason is fundamental and is a consequence of the quantum-mandated umbilical relationship between induced emission (gain) and spontaneous emission (noise) exacerbated by the modal concentration of optical energy in the high loss III-V material....
We present DFabric, a 12-rack, 180-server DCN using multiwavelength switching and interconnection. DFabric implements real-time network traffic and per-link utilization monitoring, and full-stack optimization by jointly optimizing optical switching and network flow routing.
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