OIF to double data rate with a 224G electrical interface

• The OIF will develop a faster electrical signalling standard 
• The 224-gigabit standard will make optical modules sleeker 
• It will also help data centre operators keep up with ever-growing software workloads

Nathan TracyIt was just a matter of time before the OIF started on the next electrical interface standard beyond 112 gigabits-per-second (Gbps).

There have been announcements of new 800-gigabit optical modules along with growing interest in co-packaged optics, where optical interfaces are added alongside semiconductor chips.

Nathan Tracy, TE Connectivity and OIF president, says member companies will need to be creative to develop a 224-gigabit electrical interface. Getting signals to travel at such speeds over workable distances will be a challenge.  

The project, to kick-off in August, will begin with a study phase that will help identify the interface types needed.  

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OFC 2014 product round-up - Final part

Part 2: Client-side technologies

The industry is moving at a clip to fill the void in 100 Gig IEEE standards for 100m to 2km links. Until now, the IEEE 10km 100GBASE-LR4 and the 10x10 MSA have been the interfaces used to address such spans.

But responding to data centre operators, optical players are busy developing less costly, mid-reach MSAs, as was evident at the OFC exhibition and conference, held in San Francisco in March. 

Meanwhile, existing IEEE 100 Gigabit standards are skipping to the most compact CFP4 and QSFP28 form factors. The -LR4 standard was first announced in a CFP in 2010, and moved to the CFP2, half the size of the CFP, in 2013. Now, several companies have detailed CFP4 -LR4 products, while Source Photonics has gone one better, announcing the standard in a QSFP28.

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OFC/NFOEC 2013 product round-up - Part 2

 Second and final part

• Custom add/drop integrated platform and a dual 1x20 WSS module
• Coherent receiver with integrated variable optical attenuator
• 100/200 Gigabit coherent CFP and 100 Gigabit CFP2 roadmaps     
• Mid-board parallel optics - from 150 to over 600 Gigabit.
• 10 Gigabit EPON triplexer 

Add/drop platform and wavelength-selective switches

Oclaro announced an add/drop routing platform for next-generation reconfigurable optical add/drop multiplexers (ROADMs). The platform, which supports colourless, directionless, contentionless (CDC) and flexible grid ROADMs, can be tailored to a system vendor's requirements and includes such functions as cross-connect switching, arrayed amplifiers and optical channel monitors.

"If we make the whole thing [add/drop platform], we can integrate in a much better way"

Per Hansen, Oclaro

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FPGA transceiver speed hikes bring optics to the fore

Despite rapid increases in the transceiver speeds of field-programmable gate arrays (FPGA), the transition to optical has begun.

FPGA vendors Xilinx and Altera have increased their on-chip transceiver speeds four-fold since 2005, from 6.5Gbps to 28Gbps. But signal integrity issues and the rapid decline in reach associated with higher speed means optics is becoming a relevant option.

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Optical engines bring Terabit bandwidth on a card

Avago Technologies is now delivering to customers its 120 Gigabit-per-second optical engine devices. 

Such a parallel optics design offer several advantages when used on a motherboard. It offer greater flexibility when cooling since traditional optics are normally in pluggable slots at the card edge, furthest away from the fans. Such optical engines also simplify high-speed signal routing and electromagnetic interference issues since fibre is used rather than copper traces.

Figure 1: Fourteen 120Gbps MiniPods on a board. Source: Avago Technologies

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Optical transceivers: Pouring a quart into a pint pot

Transceiver feature - 3rd and final part

Optical equipment and transceiver makers have much in common.  Both must contend with the challenge of yearly network traffic growth and both are addressing the issue similarly: using faster interfaces, reducing power consumption and making designs more compact and flexible.  

Yet if equipment makers and transceiver vendors share common technical goals, the market challenges they face differ. For optical transceiver vendors, the challenges are particularly complex.

LightCounting's global optical transceiver sales forecast. In 2009 the market was $2.10bn and will rise to $3.42bn in 2013

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