40G passive optical networks take shape
July 18, 2012 // Rick Merritt
The Full Service Access Network, an alliance of about 85 telecom providers and their vendors, picked a technical proposal for 40 Gbit/second passive optical networks. The group is hammering out details of its recommendations in hopes they can be ratified as standards next year and emerge in shipping systems in 2015
The FSAN group culled more than a dozen proposals down to one supported by several companies including Alcatel-Lucent, Huawei and ZTE that calls for use of time and wavelength division multiplexed (TWDM) technology. The proposal includes optional support for a wavelength division multiplexed overlay backed by Nokia Siemens Networks among others.
The group will submit its recommendations to the International Telecommunications Union for inclusion in the so-called NG-PON2 standard. It is the follow on to today’s XGPON technology that delivers 10 Gbits/s downstream and 2.5 Gbits/s upstream.
The proposal calls for supporting a stack of at least four wavelengths each carrying 10 Gbits/s of data. Engineers have discussed versions of the technology using as many as eight wavelengths to deliver 80 Gbits/s to end users and a quarter of that capacity upstream to the carrier network.
“The easiest thing about TWDM is it’s a known, proven technology and at least some components are already available for aspects of the system,” said Martin Carroll, chairman of FSAN and a distinguished member of technical staff at Verizon. “Operators unanimously agreed that was the technology we wanted to focus on,” he said.
Engineers must now fit which wavelengths the new technology will use into existing optical spectrum bands operators have dedicated to PONs, RF video and other applications, said Carroll. The proposal is expected to support distances of 40 kilometers without field amplifiers.
“That’s a huge challenge with the technology today,” he said.
The FSAN group is one of a handful working on bolstering next-generation optical networking speeds.
An IEEE group is meeting this week to discuss the future of Ethernet. One working group is debating multiple proposals for lowering the costs of today’s 100 Gbits/s Ethernet to accelerate deployments of the technology. Another is continuing work to assess the next big leap which has included a debate between advocates of 400 Gbits/s and those favoring a terabit/s.
Meanwhile, the Optical Internetworking Group met last week, hammering out a handful of proposals for 100 and 400 Gbit/s interfaces. The group also hosted a workshop on software-defined networking.
Biodegradable electronics debut
July 03, 2015
Today our landfills are being overrun by discarded electronic devices fabricated on silicon substrates that do not biodegrade ...
Power magnetics Lab Kit enters education
Automotive software design: new challenges through multiprocessing
Ultrasound sensor protects pedestrians
Dielectric material helps keep LED packages much cooler
PowerChip plans Chinese fab for display, sensor ICs
July 02, 2015
A former DRAM vendor, now foundry, is joining a trend towards supporting manufacturing in China, according to local reports. ...
XeThru Bot simulates breathing for sensor testing: built from Lego
Sony to raise $3.6bn to speed reinvention as component company
Startup's tech is Intel's Quark neural network
- Critical Requirements in High Speed Signal Generation Applications
- The 400XAC Series: Two Major Advantages that Simplify Functional Testing
- A Smart Way to Drive ECU Consolidation
- Autonomous Driving: An Eye on the Road Ahead
InterviewCEO interview: Cadence is about enablement, collaboration
EDA companies are being asked to provide expertise from the circuit- to the system-level observes Lip-Bu Tan, CEO of EDA software vendor Cadence Design Systems Inc. Covering such a breadth of endeavour ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.