Showing posts with label Terabit. Show all posts
Showing posts with label Terabit. Show all posts

Monday, September 19, 2016

Nokia Bell Labs, T-Labs and TU Munich Hit 1 Tbps w New Modulation

Nokia Bell Labs, Deutsche Telekom T-Labs and the Technical University of Munich have demonstrated a new modulation technique that achieved a net 1 Terabit per second transmission rate -  close to the theoretical maximum information transfer rate of that channel and thus approaching the Shannon Limit of the fiber link.

The trial, which was carried out as part of the Safe and Secure European Routing (SASER) project, used the optical fiber network of Deutsche Telekom. Bell Labs is calling the novel novel modulation approach "Probabilistic Constellation Shaping (PCS)."  It uses quadrature amplitude modulation (QAM) formats to achieve higher transmission capacity over a given channel to significantly improve the spectral efficiency of optical communications. PCS modifies the probability with which constellation points - the alphabet of the transmission - are used. Traditionally, all constellation points are used with the same frequency. PCS cleverly uses constellation points with high amplitude less frequently than those with lesser amplitude to transmit signals that, on average, are more resilient to noise and other impairments. This allows the transmission rate to be tailored to ideally fit the transmission channel, delivering up to 30 percent greater reach.

Marcus Weldon, president Nokia Bell Labs & Nokia CTO, said:  "Future optical networks not only need to support orders of magnitude higher capacity, but also the ability to dynamically adapt to channel conditions and traffic demand. Probabilistic Constellation Shaping offers great benefits to service providers and enterprises by enabling optical networks to operate closer to the Shannon Limit to support massive datacenter interconnectivity and provide the flexibility and performance required for modern networking in the digital era."

https://www.bell-labs.com/

Monday, February 15, 2016

Mitsubishi Electric Develops 1Tbps Multi-subcarrier Optical Transceiver

Mitsubishi Electric Corporation has developed a multi-carrier optical transceiver capable of one Terabit per second (1 Tbps) rates -- a 10-fold improvement over current mainstream commercial transceivers, which operate at up to 100 Gbs) per optical receiver.

Mitsubishi Electric said it achieved the 1Tbps transmission rate with existing optical fibers by using a multi-subcarrier technology that transmits 11 light waves (subcarriers) simultaneously in a single channel by using an optical comb, a device that creates a series of discrete, synchronized optical waves equally and densely spaced in the channel. While conventional methods would require 11 receivers for the same number of subcarriers, this new technology only requires a single receiver due to the use of densely spaced, synchronized subcarriers in a single channel and novel multi-subcarrier signal processing algorithms. No major changes are required to the existing optical network infrastructure, keeping the cost of deploying this new technology quite low.

Usually, when using subcarriers for optical communication, each subcarrier undergoes different signal distortions, which results in damaged data like video distortion on the receiving end. To avoid this problem, Mitsubishi Electric used pilot signals to accurately realign the subcarriers at the receiver. Known pilot symbols are periodically inserted into the transmitted signal, which serves as a landmark for correct orientation of all subcarriers and prevents data damage.

The experiment also achieved a spectral efficiency of 9.2b/s/Hz, which as of January 2016, was the highest in the world in a 1Tbps transmission using a single optical receiver.

http://www.mitsubishielectric.com/news/2016/0215.html

Thursday, November 19, 2015

Bell Labs' MIMO-SDM Sets Path to Petabit/Sec Optical Transmission

Bell Labs, the research arm of Alcatel-Lucent, announced a space-division multiplexed optical multiple-input-multiple-output (MIMO-SDM) system with the potential to increase current 10 to 20 Terabit-per-second fiber capacities to Petabit-per-second capacity - the equivalent of 1,000 Terabits/s.

Bell Labs said it has demonstrated real-time 6x6 MIMO-SDM using six transmitters and six receivers in combination with real- time digital signal processing to remove cross-talk.  The experiment was conducted over a 60-km-long coupled-mode fiber in Bell Labs’ headquarters in New Jersey.

The researchers claim this MIMO-SDM technique could overcome the capacity limitations imposed by the non-linear ‘Shannon limit’ on current optical fiber.

“This experiment represents a major breakthrough in the development of future optical transport. We are at the crossroads of a huge change in communications networks, with the advent of 5G Wireless and cloud networking underway. Operators and enterprises alike will see their networks challenged by massive increases in traffic. At Bell Labs we are continuously innovating to shape the future of communications networks to meet those demands,” said Marcus Weldon, CTO of Alcatel-Lucent and President of Bell Labs.

Alcatel-Lucent announced the first commercially available single-carrier 100G technology in June 2010 and the first commercially available 100G/200G single-carrier line card in 2014, that can deliver up to 24 Tbps capacity.

In 2013, Alcatel-Lucent announced the first deployment of a 400G superchannel optical link with FT Orange with a capacity of 17.6 terabits-per-second, based on the 400G Photonic Service Engine (PSE), co-developed by Bell Labs.

https://www.alcatel-lucent.com

Thursday, June 25, 2015

ADVA Joins T-Systems’ Advanced Terabit Demonstrator Project

ADVA Optical Networking announced its participation in T-Systems’ advanced Terabit Demonstrator project, which focuses on the transportation of terabit applications between high-performance computing centers in Dresden and Stuttgart (a span of over 1000 km) using T-Labs’ SASER optical testbed.  T-Systems is using software-defined networking and virtualized network functions to show how programmability can be used in advanced networks.

ADVA is supplying key components of this project, including 100 Gbps coherent systems along with its latest 33GHz ultra-narrow channel spacing technology.

“The Terabit Demonstrator isn’t simply about showcasing the future of our networks. It’s about collaboration. It’s about harnessing our strengths to see what’s truly possible,” said Eduard Beier, head, Terabit Demonstrator, T-Systems. “That’s what’s so special about the team at ADVA Optical Networking and their technology. They’ve developed an open optical networking solution that is so different to others on the market. This is especially true when you consider its transparency. It interoperates with other vendors’ equipment in such a unique way. This is a key advantage in today’s heterogeneous network infrastructures and especially in our testbed. ADVA Optical Networking was able to interoperate with a broad range of other vendors’ technology without any need for special conversions.”  

http://www.advaoptical.com

Tuesday, March 31, 2015

Facebook Deploys Infinera for Multi-Terabit European Network

Facebook has deployed an Infinera Intelligent Transport Network  to light the world's longest terrestrial optical network route, spanning 3,998 kilometers without any regeneration.

The network, which is capable of delivering up to eight terabits per second (Tbps) of data transmission capacity, stretches from Facebook's data center in Lulea, Sweden across major hubs throughout Europe. Facebook deployed the Infinera portfolio of products, which includes the DTN-X platform, to connect these hubs, harnessing Infinera’s unique FlexCoherent solution to deliver terabits of capacity on a single fiber across the continent.

Infinera said its DTN-X platform enables Facebook's European network to deliver 100G coherent transmission via 500 Gbps super-channels, with the ability to support 1.2 Tbps super-channels in the future. The high capacity super-channels are enabled by 500 Gb/s photonic integrated circuits (PICs) developed and fabricated by Infinera – the only supplier providing 500 Gb/s of transmission capacity from a single line card. PICs enable the DTN-X platform to integrate wavelength division multiplexing super-channel transmission with up to 12 Tbps of non-blocking optical transport network switching, providing seamless scaling as traffic requirements grow in the future. The DTN-X also features SDN-ready application programming interfaces that enable network programmability and automation of network operations to reduce both operational cost and service delivery times while facilitating new services.

"The Infinera Intelligent Transport Network makes it easy for us to rapidly grow network capacity while keeping operations simple,” said Niclas Comstedt, Director of Network Engineering at Facebook. “Once the equipment is in place we are able to turn up as many terabits as we need."

“I’ve worked closely with service providers around the world to test and deploy ultra-long-haul optical transport systems for over a decade,” said Steve Grubb, Fellow at Infinera. “The route we are announcing with Facebook is delivering multi-terabit capacity today and I believe this is the world’s longest 8 Tb/s capable route in production.”

"Facebook's deployment of the Infinera Intelligent Transport Network underscores the value Infinera brings to Internet content providers and datacenter operators around the world," said Tom Fallon, Infinera CEO. "Facebook is a classic example of how leading Internet content providers are building global networks that interconnect their datacenters to accelerate the delivery of high bandwidth, feature rich services worldwide.”

http://www.infinera.com/j7/servlet/NewsItem?newsItemID=447


  • In June 2013, Facebook activated its major European datacenter in Lulea, Sweden, on the Fulf of Bothnia near the Arctic Circle. The facility is powered by locally-generated hydro power. 

Thursday, March 19, 2015

PMC's DIGI-G4 Processor Scales OTN Line Card Capacity by 4X

PMC-Sierra has commenced sampling of its new DIGI-G4 chip -- the industry's highest density 4x100G OTN processor and featuring 50 percent less power per port than the previous generation.

The DIGI-G4 OTN processor, which builds on the success of PMC’s DIGI-120G, enabling the transition to 400G line cards in packet optical transport platforms (P-OTP), ROADM/WDM and optimized data center interconnect platforms for OTN switched metro networks. It increases 10G, 40G and 100G line card port density by 4X with flexible client mapping of Ethernet, storage, IP/MPLS and SONET/SDH, while reducing power by 50 percent per port. DIGI-G4 builds on the IP from DIGI-120G, enabling customers to maintain their rich feature set and software investment, which reduces time to market by up to six months and lowers development costs.

Significantly, DIGI-G4 delivers multi-rate, sub-180ns latency OTN encryption, allowing cloud and communications service providers to ensure security without compromising performance. DIGI-G4 supports sub-wavelength OTN encryption and is compatible with OTN switched networks. PMC said these these capabilities, combined with the densest 10G/40G/100G Ethernet ports, enables a new class of low-power, high-capacity transport platforms optimized specifically for the hyperscale data center WAN interconnect market (see whitepaper).

“Without DIGI-G4 the industry would be challenged to transition to 400G OTN switched metro networks,” said Babak Samimi, vice president of marketing and applications for PMC’s Communications Business Unit. “The world’s leading OEMs are designing around DIGI-G4 because our solution allows them to scale their product portfolios to the highest capacities at half the power per port, while leveraging their existing DIGI software investment. Coupled with new capabilities like OTN encryption, we’re solidifying PMC’s position as the industry leader in OTN processors.”

DIGI-G4 Highlights

  • Industry’s first single-chip 4x100G solution for OTN switched line cards
  • Integrated 100G Gearbox for direct connect to CFP2, CFP4 and QSFP28 transceivers
  • Industry’s highest density 10G, 40G and 100G multi-service support, including Ethernet, storage, IP/MPLS and SONET/SDH
  • Industry’s first sub-wavelength OTN encryption solution to secure the cloud
  • Industry’s first 25G granularity flexible framer to DSP interface providing scalable line-rates to match the programmable modulation capabilities found in next-generation Coherent DSPs
  • Multi-chip Interlaken interconnect solutions for scalable compact chassis data center interconnect applications
  • High performance OTN-SDK with adapter layer software accelerates customer time to market

The PM5990 DIGI-G4 is sampling now.

http://www.pmcs.com/OTN

Thursday, February 26, 2015

CenturyLink Tests 1 Tbps Super Channels with Ciena

CenturyLink, the third largest telecommunications company in the U.S., has successfully tested superchannel transmission speeds of one terabit per second (1 Tbps) on a portion of its fiber network in central Florida.  The test used Ciena’s 6500 packet-optical platform equipped with WaveLogic 3 16QAM-based coherent optics and Flexible Grid photonic layer. The terabit superchannel, composed of five 200 Gbps wavelengths closely packed together, more than doubled the network’s traffic carrying capacity during the trial, demonstrating the scalability and efficiency of CenturyLink’s network.

“This 1 terabit per second trial complements the work we are doing to transform our network and prepares us to meet our customers’ growing bandwidth needs now and into the future,” said James Feger, vice president, CenturyLink network strategy and development. “Being able to quickly scale our network’s capacity to keep up with increasing bandwidth demands means that customers will continue to have a positive experience using our cloud, hosted IT and high-speed broadband services, as well as video services like CenturyLink Prism TV.”

Spectral efficiency gains in the trial were achieved by using Ciena’s WaveLogic 3 based 16QAM coherent modulation, WaveLogic 3 spectral shaping, and Flexible Grid technologies.

http://news.centurylink.com/news/centurylink-successfully-delivers-terabit-speeds-in-central-florida-field-trial

Monday, January 19, 2015

Infinera Supplies DTN-X for MENA's trans-Egypt Terrestrial Network

Infinera announced the deployment of its DTN-X platform across Middle East and North Africa (MENA) Submarine Cable System's trans-Egypt terrestrial network.  The installation will allow MENA to provide wholesale carriers with a range of connectivity services from STM-1 to 100 Gbps and terabit capacity.

MENA, a subsidiary of Orascom Telecom Media and Technology, owns and operates a submarine telecommunications system connecting Europe to the Middle East and Southeast Asia.

“We deployed the Infinera Intelligent Transport Network on this crucial phase of our network because we were looking for a solution with features that meet MENA’s standards of highly reliable and advanced networks solutions," said Ahmed Khalaf, managing director of MENA. "The solution’s OTN switching capability provides the ability to offer our customers terabit capacity immediately upon deployment and the scalability realized from this network enables MENA to use time as a weapon to offer wholesale customers top-notch services.”

http://www.infinera.com

Tuesday, December 9, 2014

GlobeNet Deploys Infinera on US Terrestrial Network

GlobeNet, a wholesale provider of Latin and North America data network services, has deployed Infinera's DTN-X packet optical transport networking platform across its North America routes in the Northeast and South Florida.

GlobeNet's submarine cable network spans 23,500 km system and offers the lowest latency available between the Americas. The network links cable landing stations in Tuckerton, NJ and Boca Raton, FL, USA, with cable landing stations in Fortaleza (CE) and Rio de Janeiro (RJ), Brazil, St. David’s, Bermuda, Barranquilla, Colombia as well as Maiquetía, Venezuela.

GlobeNet has deployed an Infinera Intelligent Transport Network across its entire U.S. terrestrial backhaul network. The Infinera DTN-X offers GlobeNet the capacity to deliver 100 Gbps coherent transmission today via 500 Gbps super-channels, with a forward-scale design to support terabit super-channels in the future.

Infinera said this upgrade provides GlobeNet a network that can deliver over eight terabits per second (Tbps) of transmission capacity on a single fiber.

"GlobeNet's selection of an Infinera Intelligent Transport Network for its North America backbone underscores the value of our solutions to wholesale carriers operating mission critical networks," said Scott Chandler, Infinera vice president, North America sales. “The Infinera Intelligent Transport Network enables GlobeNet to automate, converge and simplify its optical transport network to reliably deliver advanced services to its customers.”

http://www.infinera.com
http://www.globenet.net

Monday, November 17, 2014

CenturyLink and Infinera Deliver Terabit to SC14 in New Orleans

Infinera and CenturyLink are delivering one terabit per second (1 Tbps) of super-channel transmission capacity to support the SCinet network at this week's International Conference for High Performance Computing, Networking, Storage and Analysis (SC14) at the Ernest N. Morial Convention Center in New Orleans.

CenturyLink currently offers 100 GbE Optical Wavelength Service to research institutions and laboratories, including those at more than 150 U.S. Department of Defense locations through a contract for the Defense Research and Engineering Network; financial and educational institutions; Internet content providers; and is delivering these Ethernet services to enterprise customers across the U.S. and in select international cities through a dedicated network connection.

"This terabit deployment demonstrates the scale, reliability and efficiency of our network and complements the 100 gigabit Ethernet services we have available to our customers today," said Pieter Poll, senior vice president of national and international network planning at CenturyLink. "The delivery of terabit capacity on SCinet demonstrates the rapid provisioning of services and the ability to turn up terabit capacity in minutes."

SCinet is one of the most powerful and advanced networks in the world, created each year for the Supercomputing Conference.

"This demonstration with CenturyLink illustrates the ability to rapidly scale bandwidth and provision services across an Intelligent Transport Network," said Bob Jandro, Infinera senior vice president, worldwide sales. "Working with CenturyLink to dynamically deliver terabit capacity over their backbone emphasizes the value of our solutions in powering one of the largest networks in the U.S."

http://www.infinera.com
http://www.centurylink.com
http://sc14.supercomputing.org

Thursday, November 13, 2014

ZTE's Optical Transmission Record: 16 Tbps over 3,500km

ZTE announced an optical transport milestone:  24-hour, error-free transmission at 16 Tbps over 3,500 km.

The test used ZTE's WDM/OTN platforms with anced Nyquist WDM spectral compression optical modulation and optical impairments mitigation coherent reception techniques in the C band.  Erbium-doped fiber amplifiers (EDFA)  were deployed with 100 km span separations. The test achieved a spectral efficiency of 4bit/Hz/s.

"The successful test will enable ZTE to help operators increase network capacity several times over longer distances,” said Chen Yufei, Vice General Manager of Bearer Network Products at ZTE. “The strength of ZTE’s T-bit transmission technology helps our customers achieve sustainable growth in network bandwidth and reduce total cost of ownership.”

http://wwwen.zte.com.cn/en/press_center/news/201411/t20141112_428988.html


  • In September 2013, ZTE became the first equipment manufacturer to implement single-channel directly-detected 50Gb/s optical 64QAM-OFDM signal transmission and receiving and realize realtime fiber transmission of the signal, breaking the world record of single-channel transmission rate of 10Gb/s optical OFDM signal.
  • In October 2013, ZTE worked with Beijing Institute, China Telecom to complete 1T ultra long-distance optical transmission realtime system experiment and make the world record of realtime transmission over 3200km. In March 2014, ZTE became the first in the world to implement realtime transmission of dual carrier 100Gb/s directly detecting 16QAM-OFDM signal.


Tuesday, September 9, 2014

Infinera and DANTE Demo Single-Card Terabit Super-Channel

Infinera and DANTE, the European advanced technology research network organization, successfully demonstrated a single card terabit super-channel on an active segment of GÉANT's production network between Budapest, Hungary and Bratislava, Slovak Republic.

The demonstration showed for the first time how a single photonic integrated circuit (PIC) can enable more than a terabit of super-channel coherent capacity from a single line card with a single fiber connector.

Infinera said the demonstration illustrated how the single card could plug into the existing line card slot of the Infinera DTN-X packet optical networking platform, which will be able to upgrade service to 1.2 Tb/s per slot in the future with a total of 12 Tb/s of non-blocking switching capacity in a single rack. This design is intended to provide forward-scale to support up to twelve 100 GbE interfaces or three of the emerging 400 GbE per 1.2Tb/s slot in the future, and the DTN-X will be able to support up to ten of these slots per chassis. In addition to the 12 Tb/s in a single bay, the DTN-X platform is designed to scale up to 240 Tb/s of non-blocking capacity managed as a single large switch.

"This is not only a single line card super-channel -- it is also a single chip super-channel," said Geoff Bennett, Director of Solutions and Technology at Infinera. "Large scale PIC technology is fundamental to making terabit scale super-channels a practical reality. The small footprint of the terabit scale PIC means we will be able to more than double the capacity of our line cards and our DTN-X chassis in the same rack space; and for all of the DTN-X customers around the world that means they can more easily scale to meet the ever-growing demand from the Internet."

"This is a great example of how the GÉANT network facilitates the innovation of new networking technologies, helping to shape the Internet of today and tomorrow," said Michael Enrico, CTO of DANTE. "This prototype service from Infinera will help us to continue to support the ever growing needs of our NREN (National Research and Education Network) partners and the research and education communities we all serve."

http://www.dante.net
http://www.infinera.com


Thursday, August 28, 2014

South Africa's MTN Tests 2.4 Tbps Wavelength with Huawei

South Africa-based MTN has conducted a live trial of Huawei's Transport Software-Defined Networking (SDN) and 2.4 Tbps wavelength-division multiplexing (WDM) system.

The ultra-fast single-channel 2.4 Tbps field trial took place on MTN’s national fibre backbone network in South Africa. In the first scenario, 2.4 Tbps with 16QAM (Quadrature Amplitude Modulation) was achieved over a transmission distance exceeding 300 km. In the second scenario, 2 Tbps with QPSK was achieved over a transmission distance of 1031 km.

Huawei described the system as the biggest in terms of capacity tested to date. In addition to the large system capacity, the "world’s first" transport SDN new features were also tested. Huawei Transport SDN solutions, using physical network modeling and resource abstraction, have realized transmission pipe virtualization. These advances allow traditional communication technology networks to be "IT-like". This trial successfully demonstrated SDN features such as Bandwidth on Demand (BoD), Virtual Transport Service (VTS) and Automatic O&M functions.

Mr. Navi Naidoo, Group Technology Officer, MTN, said: "With this successful field trial, we have demonstrated our commitment to digital innovation. MTN continues to invest in future-proof transport networks to realize world class technologies, not only to our existing markets, but to extend our technology offerings globally. We believe that networks such as cloud computing, streaming media and mobile broadband must be scalable, intelligent and flexible. To this end, Huawei's next generation optical evolution concept 'SDN-based flex optical network' properly fits our requirements."

Mr. Zha Jun, President of Huawei's Fixed Network Business Unit, said: "Huawei will maintain cooperation and joint innovation with MTN, and continue to promote the commercialization process of SDN and ultra-high speed optical transmission technology, in order to jointly meet the challenges of a digital future. "

http://www.huawei.com

Tuesday, July 15, 2014

Coriant and Allied Fiber Test 1 Terabit Super-Channel

Coriant and Allied Fiber successfully transmitted a 1 Terabit-per-second (Tbps) super-channel over a 1,700 km fiber optic ring connecting West Palm Beach to Jacksonville, Florida.

The terabit field trial was conducted on Allied Fiber’s Southeast Florida segment using the commercially available Coriant hiT 7300 Multi-Haul Transport Platform and pre-commercial software, over Allied Fiber's new Corning fiber. The trial demonstrated 1 Tbps super-channel transmission in a 368.7 gigahertz (GHz) grid over 1,700 km. In addition, it showed a greater than 35 percent improvement in spectral efficiency which significantly increases the capacity of the system compared to conventional fixed grid technology.


The trial also demonstrated the flexible allocation of the 1 Tbps super-channel by placing it in three separate locations within the C-band, thus maximizing the usability of existing fiber resources.

Coriant said this capability comes with an improved spectral efficiency of 3.4 bits per second per Hertz (b/s/Hz) and provides a maximum fiber capacity of 13 Tbps over a distance of 1,700 km on field-installed fiber while using commercial-grade equipment.

"We are pleased to team with Allied Fiber to demonstrate the value that next-generation optical networking technologies can bring to broadband users," said Pat DiPietro, CEO, Coriant. "We are committed to helping our partners like Allied Fiber meet the capacity requirements of residential and business end-user services with systems capable of seamless and efficient scalability to 1 Terabit per channel and beyond."

"We are excited with the results of the trial with Coriant on our network-neutral infrastructure," said Hunter Newby, CEO of Allied Fiber. "It highlights how our new Corning SMF 28e+ fiber has performed carrying 1 Terabit transmission which should be encouraging news for all network operators looking to light their own transport route both for the capabilities of the technology and for the availability of the long-haul dark fiber to run it on."

Allied Fiber, which was founded in 2008, offers a combination of long-haul and multi-access point, short-haul fiber coupled with its own colocation facilities that provide control of the underlying physical assets to its network operator customers.

http://www.coriant.com
http://www.alliedfiber.com

Monday, June 30, 2014

Huawei Launches 1T WDM Line Card

Huawei launched the world's first 1T WDM line card.

The line card delivers 800-km transmission based on common G.652 fibers and erbium-doped fiber amplifiers (EDFAs), but without regeneration. It can encapsulate client signals of any rate into an OTN-based 1 Tbps channel for transmission.

A demonstration was shown at the Next Generation Optical Networking Forum last week using Huawei's flagship OSN 9800 platform.

Huawei said its line card uses Optical Digital Signal Processing (oDSP) algorithm for processing high-speed signals. Switching between short-haul metro mode (ultra-high-capacity transmission) and ultra-long-haul backbone mode (ultra-long-haul transmission) can be implemented through software-based modulation scheme reconfiguration. The short-haul metro mode reaches a capacity of more than 20 Tbit/s per fiber, nearly triple that of current mainstream commercial 100G systems. The ultra-long-haul backbone mode supports more than 10 Tbit/s transmission per fiber over a distance of 3,000 km.

Huawei noted that it has deployed over 200 commercial 100G networks worldwide to date.

http://pr.huawei.com/en/news/hw-346706-1twdm.htm#.U7F1PfldVF4


  • In 2013, Huawei demonstrated a 40T Wavelength Division Multiplexing (WDM) prototype at the OFC/NFOEC 2013 event in Anaheim, California. The prototype supports simultaneous transmission of 20 C-band optical channels running at 2 Tbps, providing an industry-leading capacity of up to 40 Tbps per fiber. Huawei cited three innovations in its platform:
    The combined use of Electrical Orthogonal Frequency Division Multiplexing (eOFDM) and frequency-domain Hybrid Quadrature Amplitude Modulation (QAM) technologies substantially improve spectrum efficiency to 10 bit/s/Hz.

    The combined use of Flex-Optical Digital Signal Processing (Flex ODSP) and Hybrid Soft-/Hard-Decision Multi-level Coding (HMLC) technologies extend the transmission distance to beyond 1,000 km over common single-mode fiber and Erbium-Doped Fiber Amplifiers (EDFAs).

    Software-implemented transceiver technology allows optical modulation formats such as Quadrature Phase-Shift Keying (QPSK), 16QAM, 32QAM, and 64QAM to be adjusted or combined, achieving a configurable transmission rate and distance for each service. As a result, dynamic service needs in varied scenarios can be easily met.

  • In 2012, Huawei completed a 2 Tbps WDM field trial with Vodafone, achieving up to 3,325 km transmission for 2 Tbps signals. The 40T WDM prototype is another major breakthrough in high-speed transmission proving current commercial optical networks will be ready for the upcoming flood of digital traffic.

Wednesday, April 16, 2014

Tera Santa Consortium Demos 1 Tbps with ECI, Finisar, Technion

ECI Telecom, Finisar, MultiPhy, and the Technion Israel Institute of Technology have successfully demonstrated 1Tb/s transceiver transmission with the Tera Santa Consortium.

In the trial, the consortium transported non-regenerated 1Tb/s coherent super channel signal through the German Research Network - Deutsches Forschungsnetz e.V. (DFN-Verein) optical network. The trial, which took place at the Technische Universität Dresden, ran over DFN’s live X-WiN network, and used the 1Tb/s transceiver developed by the Tera Santa Consortium, as part of its research on 1Tb/s adaptive coherent channel behavior. It demonstrates the advanced capabilities of the Tera Santa 1T transmission system and technologies in compensating for channel impairments and chromatic dispersion utilizing advanced QAM16 and OFDM modulations and algorithms.

The Tera Santa Consortium was established in 2011 as an initiative of the Israeli Chief Scientist Office in the Ministry of Economy, through the Magnet Program which promotes cutting-edge technologies for the future. The Tera Santa Consortium brought together Israeli technology companies and universities to develop the world’s first Orthogonal Frequency Division Multiplexing (OFDM)-based optical transceiver. The members of the consortium are ECI Telecom, Finisar Corporation, MultiPhy, Cello, Civcom, Bezeq International, the Technion Israel Institute of Technology, Ben-Gurion University, the Hebrew University in Jerusalem, Bar-Ilan University and Tel-Aviv University.

For the trial, ECI deployed its Apollo family of packet-optical transport solution across DFN’s X-WiN’s network in 2012, and has since upgraded it to support the delivery of 100G services

Finisar demonstrated the software-defined 1 Terabit optical transceiver, which hosted the different algorithms developed by the consortium, in an end-to-end transceiver platform utilizing Finisar Flexgrid™ - WSS used to add/drop the 200GHz super channel signal. The OFDM algorithms were developed by both MultiPhy (128 OFDM carriers) and the Technion (1024 OFDM carriers), using two different implementation approaches.
"ECI and our technology partners Finisar, MultiPhy and the Technion, members of the Tera-Santa consortium, demonstrated the power of 1-terabit optical link coherent technology. With such high transmission rates, DFN can exponentially increase its network capacity and provide its users better and more cost effective services," stated Shai Stein, CTO, ECI Telecom and Consortium Chairman.

http://www.ecitele.com/

Tuesday, March 11, 2014

Bright House Tests 400G and 800G Over Live Network with Fujitsu

Bright House Networks, which is the sixth largest owner and operator of cable systems in the U.S., has successfully trialed Fujitsu’s 400G transport technology in its live network.

The trial was Fujitsu’s first 400G trial with a cable MSO used Fujitsu’s 400G optical networking transceivers over the Fujitsu FLASHWAVE 9500 Packet Optical Networking Platforms (Packet ONPs). Upon completing the 400G trial, an error-free rate of 800 G was also attempted and achieved–maximizing the potential of future networking capabilities while showing their commitment to leveraging customers’ investment in their networks.

Fujitsu noted several key technical advancements demonstrated by this trial:

  • Fujitsu’s 400G and 800G Super Channel capabilities enable higher per-channel scalability; 
  • Support for adaptive modulation schemes, including DP-QPSK and DP-16QAM, opens up the ability to optimize spectral efficiency while accommodating dynamically changing reach demands
  • Increased spectral efficiency was achieved with Nyquist filtering techniques reducing optical signal bandwidth.  
  • Nonlinear compensation (NLC) techniques were employed to reduce the resulting optical penalties and extend the achievable transmission distance to overcome nonlinear fiber impairments due to optical transmission.

“Our work with Fujitsu allows us to further advance our current transport infrastructure, from 10G to 100G and now 400Gbps and beyond,” said Craig Cowden, Senior Vice President, Network Engineering, Operations and Enterprise Solutions, Bright House Networks.  “Our technology is part of people’s lives, so we continually invest in our network to deliver new and innovative solutions. This initiative provides us with the ability to upgrade the amount of bandwidth available on our existing DWDM infrastructure to support the ever-increasing High Speed Data requirements of our customers and new initiatives, such as fiber to the home, for years to come.”

http://www.fujitsu.com/us/services/telecom/news/newsroom.html



Monday, November 18, 2013

Zayo and Infinera Deliver 1 Terabit Super-Channel for Super Computing 2013's SCinet

Infinera and Zayo are delivering a one terabit per second (1Tb/s) super-channel transmission capacity in support of the SCinet network at this week's Super Computing 2013 (SC13) in Denver.

This is the first time 1Tbos of super-channel transmission capacity will be deployed on SCinet’s network, delivered with the Infinera DTN-X platform.

Zayo will bedemonstrating the rapid provisioning of 100 Gigabit Ethernet (GbE) services from the show floor in Denver to Chicago. Zayo offers 100GbE services to high-bandwidth customers including research and education institutions, Internet content providers, and government agencies. Infinera is a supplier of multi-terabit transport capacity for Zayo’s 100GbE services.

"The delivery of terabit service on SCinet demonstrates how fast Zayo can deploy capacity for our customers," said David Dunn, vice president of wavelength product at Zayo. "Through our collaboration with Infinera on this deployment, we are demonstrating our ability to expand our 100GbE services to accommodate the bandwidth-driven needs of our customers.”

http://www.sc13.supercomputing.org
http://www.zayo.com
http://www.infinera.com

Tuesday, November 12, 2013

Turk Telekom Tests 2T WDM with Huawei

Turk Telekom has tested a 2T WDM system from Huawei on its live network.

The field trial achieved groundbreaking 40 Tbps C-band transmission over a single fiber over 307 km of G.652 fiber between Ankara, the capital of Turkey, and Cankiri.

Huawei said its WDM system used advanced 32QAM modulation to deliver a net SE of up to 8 b/s/Hz or 40Tb/s C-band transmission, meaning a capacity four times higher than mainstream commercial 100G systems. In addition, using Hybrid QAM technology with 20 Tbps capacities, the trial link consisted of fiber loop between Ankara and Istanbul, stretching 1,750 km without regeneration.

Hybrid QAM technology allows software-defined tuning of modulation formats such as QPSK, 8QAM, 16QAM, 32QAM, and 64QAM for different optical signals, bringing unprecedented flexibility in service-specific capacity and transmission distance configurations.

http://www.huawei.com

  • In 2010, Turk Telekom built the national backbone network that stretches more than 34,000 km using Huawei's next-generation WDM system, and in 2012, it deployed Huawei's coherent 100G solution. 


Monday, October 28, 2013

China Telecom Carries Terabit Wavelength over 3,200km with ZTE

China Telecom Corporation Ltd. Beijing Research Institute carried a terabit wavelength over a distance of 3,200 kilometers on G.652 optical fiber without Raman amplification that was error-free for 24 hours.  The world record demonstration used ZTE’s ZXONE 8700 WDM platform and advanced Nyquist WDM Terabit PM-QPSK optical modulation and optical coherent detection technologies.  The system leveraged ultra-high-speed signal processing and soft-decision forward error correction algorithms, achieving spectral efficiency of 4bit/Hz/s.

ZTE said this latest demonstration strengthens its global leadership in terabit optical transport systems. In 2012, ZTE and Deutsche Telekom successfully completed 100G/400G/1T long-haul transmission over 2,450 kilometers, setting a record in long-distance multi-rate mixed transmission. ZTE has successfully deployed more than 50 100G trial and commercial networks globally.

ZTE noted that it achieved record revenue in optical network products in the second-quarter of 2013, achieving the industry’s fastest growth rate in the preceding 12-month period, according to data from research company Ovum.

http://wwwen.zte.com.cn/en/press_center/news/201310/t20131028_410952.html

See also