FPGAs with 56-gigabit transceivers set for 2017

Xilinx is expected to ship its first FPGAs featuring 56-gigabit transceivers next year. 

The company demonstrated a 56-gigabit transceiver using 4-level pulse-amplitude modulation (PAM-4) at the recent OFC show. The 56-gigabit transceiver, also referred to as a serialiser-deserialiser (serdes), was shown successfully working over backplane specified for 25-gigabit signalling only.

Gilles GarciaXilinx's 56-gigabit serdes is implemented using a 16nm CMOS process node but the first FPGAs featuring the design will be made using a 7nm process. Gilles Garcia says the choice of 7nm CMOS is solely a business decision and not a technical one.

”Optical module [makers] will take another year to make something decent using PAM-4," says Garcia, Xilinx's director marketing and business development, wired communications. "Our 7nm FPGAs will follow very soon afterwards.”

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Enabling coherent optics down to 2km short-reach links

Silicon photonics luminaries series

Interview 5: Chris Doerr

Chris Doerr admits he was a relative latecomer to silicon photonics. But after making his first silicon photonics chip, he was hooked. Nearly a decade later and Doerr is associate vice president of integrated photonics at Acacia Communications. The company uses silicon photonics for its long-distance optical coherent transceivers.

Chris Doerr in the lab

Acacia Communications made headlines in May after completing an initial public offering (IPO), raising approximately $105 million for the company. Technology company IPOs have become a rarity and are not always successful. On its first day of trading, Acacia’s shares opened at $29 per share and closed just under $31.

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Richard Soref: The new frontiers of silicon photonics

Silicon photonics luminaries series

Interview 4: Professor Richard Soref

John Bowers acknowledges him with ‘kicking off’ silicon photonics some 30 years ago, while Andrew Rickman refers to him as the ‘founding father of silicon photonics’. An interview with Richard Soref. 

It was fibre-optic communications that started Professor Richard Soref on the path to silicon photonics.

“In 1985, the only photonic chip that could interface to fibre was the III-V semiconductor chip,” says Soref. He wondered if an elemental chip such as silicon could be used, and whether it might even do a better job. He had read in a textbook that silicon is relatively transparent at the 1.30-micron and 1.55-micron wavelengths used for telecom and it inspired him to look at silicon as a material for optical waveguides.

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Professor Graham Reed: The calm before the storm

Silicon photonics luminaries series

Interview 3: Professor Graham Reed

Despite a half-century track record driving technology, electronics is increasingly calling upon optics for help. “It seems to me that this is a marriage that is really going to define the future,” says Graham Reed, professor of silicon photonics at the University of Southampton’s Optoelectronics Research Centre.

The optics alongside the electronics does not have to be silicon photonics, he says, but silicon as a photonics technology is attractive for several reasons. 

“What makes silicon photonics interesting is its promise to enable low-cost manufacturing, an important requirement for emerging consumer applications,” says Reed. And being silicon-based, it is much more compatible than other photonics technologies. “It probably means silicon photonics is going to win out,” he says. 

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Mario Paniccia: We are just at the beginning

Silicon photonics luminaries series

Interview 2: Mario Paniccia

 

Talking about his time heading Intel’s silicon photonics development programme, Mario Paniccia, spotlights a particularly creative period between 2002 and 2008.  

 

During that time, his Intel team had six silicon photonics papers published in the science journals, Nature and Nature Photonics, and held several world records - for the fastest modulator, first at 1 gigabit, then 10 gigabit and finally 40 gigabit, the first pulsed and continuous-wave Raman silicon laser, the first hybrid silicon laser working with The University of California, Santa Barbara, and the fastest silicon germanium photo-detector operating at 40 gigabit.

 

“These [achievements] were all in one place, labs within 100 yards of each other; you had to pinch yourself sometimes,” he says.

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Optical integration and silicon photonics: A view to 2021

LightCounting Market Research’s recent report on optical integration investigates the global market opportunity for integrated optical components including silicon photonics for the next five years. An interview with LightCounting CEO and report author, Vladimir Kozlov. 

LightCounting’s report on photonic integration has several notable findings. The first is that only one in 40 optical components sold in the datacom and telecom markets is an integrated device yet such components account for a third of total revenues.

Another finding is that silicon photonics will not have a significant market impact in the next five years to 2021, although its size will grow threefold in that time.

By 2021, one in 10 optical components will be integrated and will account for 40% of the total market, while silicon photonics will become a $1 billion industry by then. 

Integrated optics

“Contrary to the expectation that integration is helping to reduce the cost of components, it is only being used for very high-end products,” says Vladimir Kozlov, CEO of LightCounting.

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Tackling system design on a data centre scale

Silicon photonics luminaries series

Interview 1: Andrew Rickman

Silicon photonics has been a recurring theme in the career of Andrew Rickman. First, as a researcher looking at the feasibility of silicon-based optical waveguides, then as founder of Bookham Technologies, and after that as a board member of silicon photonics start-up, Kotura.

Andrew Rickman

Now as CEO of start-up Rockley Photonics, his company is using silicon photonics alongside its custom ASIC and software to tackle a core problem in the data centre: how to connect more and more servers in a cost effective and scaleable way.

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