ECOC 2015: Reflections

Gazettabyte asked industry executives what trends and highlights they noted at the recent European Conference on Optical Communication (ECOC) event, held in Valencia. Here are three views.

Valery Tolstikhin, head of a design consultancy, Intengent

ECOC was a big show and included a number of satellite events, such as the 6^th European Forum on Photonic Integration, the 3^rd Optical Interconnect in Data Center Symposium and Market Focus, all of which I attended. So, lots of information to digest. 

My focus was mainly on data centre optical interconnects and photonic integration.

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Mellanox Technologies to acquire EZchip for $811M

Mellanox Technologies plans to acquire networking chip company EZchip Semiconductor in a deal worth U.S. $811 million.

Eyal Waldman

Mellanox makes InfiniBand and Ethernet interconnection platforms and products for the data centre while EZchip sells network and multi-core processors that are used in carrier edge routers and enterprise platforms.

EZchip’s customers include Huawei, ZTE, Ericsson, Oracle, Avaya and Cisco Systems.

“Mellanox needs to diversify its business; it is still heavily dependent on the high-performance computing market and InfiniBand,” says Bob Wheeler, principal analyst, networking at market research firm The Linley Group. “EZchip helps move Mellanox into markets and customers that it would not have access to with its existing products.”

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Interconnection networks - an introduction

Part 2: Data centre switching primer to provide some background as to what Rockley Photonics is doing.    

Source: Jonah D. Friedman

If moving information between locations is the basis of communications, then interconnection networks represent an important subcategory. 

The classic textbook, Principles and Practices of Interconnection Networks by Dally and Towles, defines interconnection networks as a way to transport data between sub-systems of a digital system.

The digital system may be a multi-core processor with the interconnect network used to link the on-chip CPU cores. Since the latest processors can have as many as 100 cores, designing such a network is a significant undertaking.

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Rockley demos a silicon photonics switch prototype

Part 1: Rockley Photonics

Rockley Photonics has made a prototype switch to help grow the number of servers that can be linked in a data centre. The issue with interconnection networks inside a data centre is that they do not scale linearly as more servers are added.  

Dr. Andrew Rickman

“If you double the number of servers connected in a mega data centre, you don’t just double the complexity of the network, it goes up exponentially,” explains Andrew Rickman, co-founder, chairman and CEO at Rockley Photonics. “That is the problem we are addressing.”

By 2017 and 2018, it will still be possible to build the networks that large-scale data centre network operators require, says Rickman, but at an ever increasing cost and with a growing power consumption. “The basic principles of what they are doing needs to be rethought,” he says.

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Choosing paths to future Gigabit Ethernet speeds

Industry discussions are being planned in the coming months to determine how Ethernet standards can be accelerated to better serve industry needs, including how existing work can be used to speed up the creation of new Ethernet speeds.

The y-axis shows the number of lanes while the x-axis is the speed per lane. Each red dot shows the Ethernet rate at which the signalling (optical or electrical) was introduced. One challenge that John D'Ambrosia highlights is handling overlapping speeds. "What do we do about 100 Gig based on 4x25, 2x50 and 1x100 and ensure interoperability, and do that for every multiple where you have a crossover?" Source: Dell

One catalyst for these discussions has been the progress made in the emerging 400 Gigabit Ethernet (GbE) standard which is now at the first specification draft stage.

“If you look at what is happening at 400 Gig, the decisions that were made there do have potential repercussions for new speeds as well as new signalling rates and technologies,” says John D’Ambrosia, chairman of the Ethernet Alliance.

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Verizon prepares its next-gen PON request for proposal

Verizon will publish its next-generation passive optical network (PON) requirements for equipment makers in the coming month.

Vincent O'Byrne

The NG-PON2 request for proposal (RFP) is being issued after the US operator completed a field test that showed a 40 gigabit NG-PON2 system working alongside Verizon’s existing GPON customer traffic.  

The field test involved installing a NG-PON2 optical line terminal (OLT) at a Verizon central office and linking it to a FiOS customer’s home 5 km away. A nearby business location was also included in the trial.

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US invests $610 million to spur integrated photonics

The US government has set up its latest manufacturing initiative, the sixth of nine, to address photonic integrated circuits (PICs). The $610 million venture is a combination of public and private funding: $110 million from the Department of Defense, $250 million from the state of New York and the rest private contributions.

Prof. Duncan Moore

Dubbed the American Institute for Manufacturing Integrated Photonics (AIM Photonics), the venture has attracted 124 partners includes 20 universities and over 50 companies.

The manufacturing innovation institute will be based in Rochester, New York, and will be led by the Research Foundation for the State University of New York. A key goal is that the manufacturing institute will continue after the initiative is completed in early 2021.

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