Acacia targets access networks with coherent QSFP-DD

• Acacia Communications has announced a 100-gigabit coherent QSFP-DD pluggable module.
• The module is the first of several for aggregation in the access network.

The second article addressing what next for coherent

Part 2: 100-gigabit coherent QSFP-DD

Acacia Communications has revisited 100-gigabit coherent but this time for access rather than metro networks.

Acacia’s metro 100-gigabit coherent pluggable product, a CFP, was launched in 2014. The pluggable has a reach from 80km to 1,200km and consumes 24-26W.

Tom Williams

The latest coherent module is the first QSFP-DD to support a speed lower than the 400-gigabit 400ZR and ZR+ applications that have spurred the coherent pluggable market. 

The launching of a 100-gigabit coherent QSFP-DD reflects a growing need to aggregate 10 Gigabit Ethernet (GbE) links at the network edge as 5G and fibre are deployed.

“The 10GbE links in all the different types of access networks highlight a need for a cost-effective way to do this aggregation,” says Tom Williams, vice president of marketing at Acacia.

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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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Nokia buys Elenion for its expertise and partnerships

Nokia will become the latest systems vendor to bolster its silicon photonics expertise with the acquisition of Elenion Technologies. 

The deal for Elenion, a privately-held company, is expected to be completed this quarter, subject to regulatory approval. No fee has been disclosed.

Kyle Hollasch

“If you look at the vertically-integrated [systems] vendors, they captured the lion’s share of the optical coherent marketplace,” says Kyle Hollasch, director of optical networking product marketing at Nokia. “But the coherent marketplace is shifting to pluggables and it is shifting to more integration; we can’t afford to be left behind.”   

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ECOC 2019 industry reflections

Gazettabyte is asking industry figures for their thoughts after attending the recent ECOC show, held in Dublin. In particular, what developments and trends they noted, what they learned and what, if anything, surprised them. Here are the first responses from Huawei, OFS Fitel and ADVA.  

James Wangyin, senior product expert, access and transmission product line at Huawei  

At ECOC, one technology that is becoming a hot topic is machine learning. There is much work going on to model devices and perform optimisation at the system level.

And while there was much discussion about 400-gigabit and 800-gigabit coherent optical transmissions, 200-gigabit will continue to be the mainstream speed for the coming three-to-five years.  

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ECI Telecom details its cell-site gateway for 5G

ECI Telecom has unveiled its cell-site router for 5G that also supports existing 3G and 4G wireless standards. 

“You need to support the existing one or two generations of cellular networks,” says Jimmy Mizrahi, ECI’s executive vice president and head of global portfolio.

Jimmy MizrahiThe platform, the NPT 1022 cell-site router, is the first of several platforms that ECI will launch for 5G as it upgrades and expands its Neptune product line.

“The 1022 is part of a new line of products covering all layers of the network, starting at the cell site and going to aggregation and the metro core,” says Ezra Yehezkel, product line manager, packet transport solutions at ECI.

The Neptune portfolio will include a high-capacity packet-processing platform that can scale to 16 terabits. 

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Acacia bets on silicon as coherent enters its next phase

Gazettabyte interviewed Acacia Communications’ president and CEO, Murugesan ‘Raj’ Shanmugaraj, as the coherent technology company celebrates its 10th anniversary.

Acacia Communications has come a long way since Raj Shanmugaraj (pictured) first joined the company as CEO in early 2010. “It was just a few conference rooms and we didn't have enough chairs,” he says.

The company has since become a major optical coherent player with revenues of $340 million in 2018; revenues that would have been higher but for the four-month trade ban imposed by the US on Chinese equipment maker ZTE, an Acacia customer.

And as the market for coherent technology continues to grow, Acacia and other players are preparing for new opportunities. 

“We are still in the early stages of the disruption," says Shanmugaraj. “You will see higher performance [coherent systems] in some parts of the network but there is going to be growth as coherent moves closer to the network edge.” 

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Access drives a need for 10G compact aggregation boxes

Infinera has unveiled a platform to aggregate multiple 10-gigabit traffic streams originating in the access network. 

The 1.6-terabit HDEA 1600G platform is designed to aggregate 80, 10-gigabit wavelengths. The use of ten-gigabit wavelengths in access continues to grow with the advent of 5G mobile backhaul and developments in cable and passive optical networking (PON).

A distributed access architecture being embraced by cable operators. Shown are the remote PHY device (RPD) or remote MAC-PHY device (RMD), functionality moved out of the secondary hub and closer to the end user. Also shown is how DWDM technology is moved closer to the edge of the network. Source: Infinera.

Infinera has adopted a novel mechanical design for its 1 rack unit (1RU) HDEA 1600G that uses the sides of the platform to fit 80 SFP+ optical modules. 

The platform also features an Ethernet switch chip that aggregates the traffic from the 10-gigabit streams to fill 100-gigabit wavelengths that are passed to other switching or transport platforms for transmission into the network.

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