Agent of change

Dave Welch on how entrepreneurial problem-solving skills can tackle some of society's biggest challenges

Dave Welch is best known for being the founder and chief innovation officer at Infinera, the optical equipment specialist. But he has a history of involvement in social causes.

In 2012, Welch went to court to fight for the educational rights of children in schools in California, a story covered by newspapers in the US and abroad and featured on the front cover of Time magazine.

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ECOC 2022 Reflections - Part 1

Gazettabyte is asking industry and academic figures for their thoughts after attending ECOC 2022, held in Basel, Switzerland. In particular, what developments and trends they noted, what they learned, and what, if anything, surprised them.

In Part 1, Infinera's David Welch, Cignal AI's Scott Wilkinson, University of Cambridge's Professor Seb Savory, and Huawei's Maxim Kuschnerov share their thoughts.

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Is traffic aggregation the next role for coherent?

Ciena and Infinera have each demonstrated the transmission of 800-gigabit wavelengths over near-1,000km distances, continuing coherent's marked progress. But what next for coherent now that high-end optical transmission is approaching the theoretical limit? Can coherent compete over shorter spans and will it find new uses?

The first of several articles addressing what next for coherent.

Part 1: XR Optics

“I’m going to be a bit of a historian here,” says Dave Welch, when asked about the future of coherent.

Interest in coherent started with the idea of using electronics rather than optics to tackle dispersion in fibre. Using electronics for dispersion compensation made optical link engineering simpler.

Dave Welch

Coherent then evolved as a way to improve spectral efficiency and reduce the cost of sending traffic, measured in gigabit-per-dollar.

“By moving up the QAM (quadrature amplitude modulation) scale, you got both these benefits,” says Welch, the chief innovation officer at Infinera.

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The 50th anniversary of light-speed connections at OFC

The 50th anniversary of two key optical developments will be celebrated at the upcoming OFC show to take place in San Diego starting March 8th. 

Back in 1970 the first low-loss fibre and the first room-temperature semiconductor laser were demonstrated.

Jun Shan Wey“The low-loss fibre had a loss of 16 decibels-per-kilometre,” says Jun Shan Wey of ZTE and the OFC programme co-chair. “Without such optical fibre, there would be no chance of any long-distance communication.” 

The advent of a semiconductor laser operating at room temperature was another development of key importance, she adds.

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Infinera rethinks aggregation with slices of light

An optical architecture for traffic aggregation that promises to deliver networking benefits and cost savings was unveiled by Infinera at this week’s ECOC show, held in Dublin.

Traffic aggregation is used widely in the network for applications such as fixed broadband, cellular networks, fibre-deep cable networks and business services. 

Dave Welch

Infinera has developed a class of optics, dubbed XR optics, that fits into pluggable modules for traffic aggregation. And while the company is focussing on network edge applications such as 5G, the technology could be used in thedata centre. 

Optics is inherently a point-to-point communications technology. Yet optics is applied to traffic aggregation, a point-to-multipoint architecture, resulting in inefficiencies, says Infinera.  

“The breakthrough here is that, for the first time in optics’history, we have been able to make optics work to match the needs of an aggregation network,” says Dave Welch, founder and chief innovation officer at Infinera. 

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Books in 2017: Part 2

Gazettabyte has asked various industry executives to discuss the books they read in 2017. Here, Infinera's Dave Welch and Deutche Telekom's Yuriy Babenko provide their highlights.

Dave Welch, founder and chief strategy and technology officer at Infinera

One favourite book read this year was Alexander Hamilton by Ron Chernow. Great history about the makings of the US government and financial systems as well as a great biography. Another is The Gene: An Intimate History by Siddhartha Mukherjee, a wonderful discussion about the science and history of genetics.

Yuriy Babenko, senior expert NGN, Deutsche Telekom

As part of my reading in 2017 I selected two technical books, one general life/ philosophy title and one strategy book.

Today’s internet infrastructure design is hardly possible without what we refer to as the cloud. Cloud is a very general term but I really like the definition of NIST: Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction.

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Books in 2013 - Part 2

Alcatel-Lucent's President of Bell Labs and CTO, Marcus Weldon, on the history and future of Bell Labs, and titles for Christmas; Steve Alexander, CTO of Ciena, on underdogs, connectedness, and deep-sea diving; and Dave Welch, President of Infinera on how people think, and an extraordinary WWII tale: the second part of Books 2013.  

Steve Alexander, CTO of Ciena

David and Goliath: Underdogs, Misfits, and the Art of Battling Giants by Malcolm Gladwell. 

I’ve enjoyed some of Gladwell’s earlier works such as The Tipping Point and Outliers: The Story of Success. You often have to read his material with a bit of a skeptic's eye since he usually deals with people and events that are at least a standard deviation or two away from whatever is usually termed “normal.”

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