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.
Cutting down on personal data leaks
August 22, 2014
Now may be the right time to cut down on smartphone data leaks and reclaim a little bit of privacy, according to Yves-Alexandre ...
Great chances and risks for sensor industry in shale gas exploration
Tools out of the 3D printer conquer car production
Trinamic's stepper motor package gets you started
Webinar: Printed circuit board test and in line automation
Apple, Samsung tablet sales decline
August 21, 2014
Global tablet shipments grew 5 percent year on year to reach 52.4 million units in 2Q14, according to market analysis company ...
MCU market on a rebound, says analyst
Is free-space wireless charging viable? Dialog thinks itís worth a try
Schaeffler to boost electromobility by Formula E commitment
- Building Blocks for the Internet of Things
- New Linear Regulators Solve Old Problems
- Testing GPS with a Simulator
- DSM presents: Select the best plastic for DDR4
InterviewCEO interview: Tronics' Langlois makes moves in MEMS
Pascal Langlois has been CEO at Tronics for nine months. He discusses plans for the company and directions for the complex and diverse MEMS technology sector.
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, Altium Ltd is offering EETimes Europe's readers the chance to win one TASKING VX-Toolset for ARM Cortex-M Premium Edition, normally licensed for 2.395 Euros, for ultra-rapid prototyping and code development around ARM Cortex-M based microcontrollers.
The VX-toolset for ARM is the first TASKING compiler suite to receive the Software Platform technology, which is seamlessly...Read more
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.