ECOC 2024: AI and Optics

Being interview by Gareth Spence of Adtran at the recent ECOC 2024 conference and exhibition

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Users embrace OpenLight's silicon photonics platform

OpenLight, the open silicon photonics platform provider, can point to a successful 2024 signing up new customers. 

In 2023, OpenLight had three customers bringing photonic integrated circuit (PIC) designs to market. OpenLight has since added 14 more.  

OpenLight was formed in 2022 when Juniper Networks carved out its silicon photonics arm. Synopsys acquired a three-quarters stake in OpenLight, while Juniper retained a quarter.

“In the past, the company hadn’t really done any revenue, including when they were in Juniper,” says Adam Carter, OpenLight’s CEO (pictured). “We’ve seen a ten times increase and shown that we can be very profitable.”

The start-up has been creating industry partnerships to better serve its customers' circuit design, chip manufacturing, and packaging needs.

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Ciena sends a 1.6T optical lambda over a 470km link

• Ciena details its first live trial result using its latest WaveLogic 6 Extreme coherent modem.
• The modem will be generally available at the end of the month.  

Ciena has detailed its newest coherent modem's first optical networking performance: sending 1.6 terabits of data over a 470km fibre link.   

Helen Xenos

The field trial used Ciena's WaveLogic 6 Extreme coherent modem in telecom operator Arelion's live network.

The link connects an Equinix data centre in Ashburn to a Telxius submarine cable landing station also in Virginia. 

"The fact that we are achieving 1.6-terabit wavelengths across close to 500 kilometres is a testament to the performance and integrity of the design," says Helen Xenos, senior director of portfolio marketing at Ciena.

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ECOC celebrates its 50th anniversary

• The European Conference on Optical Communications (ECOC) is celebrating its 50th anniversary.
• The conference and exhibition will take place in Frankfurt, Germany, from September 22-26.
• Key themes at the show include satellite optical communication, artificial intelligence, networking for AI within the data centre, photonic integration, quantum and Green ICT. 

ECOC will celebrate its 50th anniversary this month.

Professor Carmen Mas MachucaThe event will include a special session highlighting the progress made in photonics over the last half century and will feature luminary speakers. 

 There will also be a celebratory event with food stalls from different countries. 

“There will be an opportunity to mingle, and we also plan an exhibition to look back at what has been achieved combined with what directions we need to take for the future,” says Jörg-Peter Elbers, an ECOC General Chair this year. 

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Making best use of data at the network's edge

Moshe Shadmon has always been interested in data, the type that is spread out and requires scrutiny.  

Moshe Shadmon

He read law at university but was also fascinated by maths and computers.

By the time Shadmon graduated with a law degree, he had set up a software company. He never practised law. 

"I think that part [not having an engineering degree] has always allowed me to look at things differently," he says.

More recently, Shadmon's interest in data has focussed on the network edge. Here, the data is typically across locations and too plentiful to fit within one machine. 

"If the data needs to be managed across many machines, it is a problem," says Shadmon. "Suddenly, solutions become complicated and expensive."

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Boosting copper’s reach in the data centre

Marvell has unveiled a chip that enables copper cables to send 1.6 terabits-per-second (Tbps) of data between equipment in the data centre. 

Copper cabling, also referred to as direct attach copper, is the standard interconnect used to connect compute nodes in a server, and between servers when building larger computing systems. 

Venu Balasubramonian

Data centre operators prefer to use passive copper cables. A copper cable costs less than an optical cable, a critical consideration when tens of thousands may be used in a large data centre.

Compute servers using the latest processors and AI accelerator chips have increasing input-output (I/O) requirements. This is causing interface speeds between servers, and between servers and switches, to keep doubling—from 400 gigabits to 800 gigabits and soon 1.6Tbps.

Moreoever, with each speed hike, the copper cable’s reach shrinks. A copper cable sending 25 gigabits of data has a reache of 7m, but it is only 2m at 100Gbps and is only 1m at 200Gbps.

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Is network traffic growth dwindling to a trickle?

“Network capacities are sufficient, and with data usage expected to plateau in the coming years, further capacity expansion is not needed. We have reached the end of history for communications.”  

Willian Webb, The End of Telecoms History

William Webb has pedigree when it comes to foreseeing telecoms trends.  

William Webb

Webb wrote The 5G Myth in 2016, warning that 5G would be a flop.

In the book, he argued that the wireless standard's features would create limited interest and fail to grow revenues for mobile operators. 

The next seven years saw the telcos promoting 5G and its capabilities. Now, they admit their considerable investments in 5G have delivered underwhelming returns.

His latest book, The End of Telecoms History, argues that telecoms has reached a maturity that satisfies the link speeds needed and that traffic growth is slowing. 

"There will be no end of new applications," says Webb. "But they won't result in material growth in data requirements or in data speeds."  

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