Xtera 100G equipment to win West African submarine cable deployment

Xtera Optical transmission equipment manufacturers, today announced its Nu-wave Optima obtain optical transmission system connecting West Africa to Europe MainOne submarine cable deployment.

MainOne to start operations in July 2010, connecting the West African country, Nigeria, Ghana to Portugal in Europe, the main access points include Portugal Seixal, Accra, Ghana, Accra, Lagos, Nigeria and Morocco, the Canary Islands, Senegal and Ivory coast with branches, after upgrading the total transmission capacity of over 10Tbps.

MainOne submarine cable operating company CEO Funke Opeke said that West African countries are experiencing the information explosion, this year has experienced rapid growth in network traffic, which brings the urgent need for network upgrades. As a major supplier of Eight West African coastal data traffic, MainOne about to connect the South-South region of Cameroon and Nigeria, MainOne need for further deployment of advanced technology to meet customers' demand for reliable high-speed communications services.

Coriant release pluggable optical layer solutions

Coriant innovative network solutions provider recently released for flexible high-speed metropolitan area network applications, to meet the needs of a variety of fixed and mobile applications pluggable optical layer having innovative and cost of the solution.

Coriant pluggable optical layer to a full range of optical layer device into a series of small form-factor pluggable devices, including amplifiers, VOA, power monitor, together light beam splitter, WSS, and so on. By providing mixing and matching various functional devices, pluggable optical layer so that operators can customize the metro optical network without the need to pay for unwanted features. When the end user when there is new demand, new features can be quickly and economically by simply adding new devices to implement, which can protect past investments.

Small size, low power consumption, with support for high-density 10G and 100G optical transmission, Coriant pluggable optical layer solutions for carrier metro network bandwidth upgrade, expand capacity to the metro edge light provides a highly cost-effective solution. This solution supports a range of metro topologies and structures, such as point to point, ring, ROADM, to provide seamless undisturbed for operators to upgrade to the full ROADM capability. Compared to traditional solutions, can save costs by more than 30%, allows operators to gradually increase demand deployment. Pluggable optical layer solution will be the first application in 7100 Coriant packet optical transport platform.

Coriant released new version of SDN transmission controller

The optical transmission system vendors Coriant has released new Transcend SDN transmission controller. The product supports multi-layer, multi-vendor environments, committed to multi-layer optimization and interoperability standards-based service to simplify network operations, support faster service provisioning, improved resource utilization. This product is an upgraded version of last year's devaluation Coriant SDN transmission controller. The main characteristics of the new product include:

* By supporting IETF RESRCONF interfaces and YANG model number voice to support more efficient business exchange.

* New automatic and programmable service provision and management capabilities, including SLA monitoring and user-defined SLA parameters to achieve a more convenient service provider.

* Fault light layer of a multilayer perception PCE path computation unit improved resource utilization. Operators can now deploy resources according to the service request and SLA parameters.

* As the network of virtual and variable levels of network abstraction to implement flexible network segmentation.

Coriant company CTO Uwe Fischer noted that a multi-vendor environment, resulting in a lack of effective exchange operators could not face a large-capacity low-cost dynamic business needs. The new version of the SDN transmit controller gives users a simple, programmable, the actual demand for the SDN tools.
 
Coriant indicates that the SDN controller has been deployed to the customer's network test run.

ROADM market entered a rapid growth period

According to well-known market research firm IHS Infonetics latest report shows that in the optical transmission market, in addition to still maintain a rapid growth outside 100G, ROADM market has become another one star. 2015 second quarter, ROADM market income ratio in the entire WDM market revenue up 45%. The report predicts that, ROADM market in 2015 revenue will grow 12% in 2104, and 2019, the market's compound annual growth rate as high as 12%, which greatly exceeds the entire WDM market compound annual growth rate of 9%, to become the next four years, WDM segment of the market the fastest growing segment.

Figure: Infonetics report ROADM market entered a rapid growth period

As can be seen from the chart IHS Infonetics report, in fact, starting in 2011, ROADM market performance had already started to speed, there's little need to explain that, 100G technology is also starting in 2011 at a global scale commercial. It is a coincidence?

Let's take a look at the status quo of large cities in China, the road to development, and perhaps give us some enlightenment. In recent years, some large cities continue to build and expand roads, often encounter the problem of the transformation of urban interchange. Some design and construction of transportation hub earlier, in the rapid development of today's urban road traffic has become the bottleneck. Similarly, the development of optical networks is also facing a similar situation. With 2011 global begin large-scale commercial 100G coherent optical transmission technology, many operators have seen the super-high-speed optical transmission technology challenge existing optical network architecture, and embarked on a strategy to reshape the optical network architecture project. Therefore, it is not a coincidence, but the optical network development inevitable trend.

Technology and market jointly call new networking technology of optical network

With the rise of Internet penetration to various industries in various fields, as well as cloud computing, big data, networking and other technology applications, data traffic is continuing to grow rapidly. According to IHS Infonetics analytical report 100G module shipments increased from 2011 in 2000 to 2014 or so quickly over 120,000. 100G optical transmission system on a global scale is rapidly expanding. In recent years, the industry has set his sights on Super 100G technology. Alcatel-Lucent deployed the world's first commercial 400G optical transport network in 2013, its 200G wavelength-division-board programmable achieve volume shipments in 2014. According to market analysts predict that by around 2017, 400G will gradually begin large-scale commercial.

You can see from the above data, ultra-high-speed optical transmission technology is rapidly improving the transmission capacity of the fiber, which makes electrical cross-way network to OTN optical network node is facing great challenges. According to the development trend of optical networks, long-distance backbone and metro core network topology often will tend to grid, the dimensions of each node may reach 8-dimensional, or even more. In this case, if pure electric cross 100G OTN networking mode, which means that the capacity of each node will reach 8x8T = 64T. If you consider the way for future 400G OTN network, then the capacity will be close to 200T, which is currently on the market, the largest capacity OTN electrical cross-connect equipment is far unable to meet. Meanwhile, large-scale OTN electrical cross matrix bound to bring higher power requirements and cooling requirements, as well as the difficulty of network evolution challenges operators have realized in the actual deployment of the deployment faced.

Future-oriented development, technology and markets are calling the new Optical Networking technology.

Optical Communication Systems technology trends - beyond 100G

With the progress of social information process, to video, cloud computing, networking and the representative of the emerging business demand for bandwidth surge, the existing backbone optical transmission system interconnection capacity can not meet the growing demand, an urgent requirement to further enhance transmission capacity.

In fact, as experienced from 2.5Gbit/s-> 10Gbit/s-> 40Gbit/s-> 100Gbit/s transmission capacity to enhance network surge in demand, its single channel optical transmission system transmission rate, is preparing the next generation Ultra 100G optical transmission systems. The optical transmission multiplexing dimension from a simple time division multiplex development, wavelength, frequency, polarization, multidimensional multiplex transmission mode, multi-pronged approach. Future demand for network capacity optical transmission, Pbit multi-core space division multiplexing as well as orbital angular momentum of photons reuse industry has become a hot topic. In the specific implementation, advanced quadrature amplitude modulation, coherent reception, digital signal processing, multi-carrier technology and optoelectronic integrated technology and other new technologies have been gradually introduced and continue to optimize and improve the optical transmission performance and reduce the cost of optical transmission.

Consider cost and compatibility, etc., based on full use of the fiber optic cable has been laid, the existing optical transmission systems by upgrading and transformation of the optical transceiver unit to raise a single wavelength channel transmission data rate of ways to enhance system capacity, it has the best cost and feasibility. Ultra 100G optical transmission will inherit design 100G optical transmission systems, the use of polarization multiplexing, multi-level modulation spectrum efficiency, increase the use of digital coherent reception receiver sensitivity and channel equalization capability.

Ultra 100G optical transmission is intended to further enhance the transmission capacity in a single fiber band resources available under the same circumstances, the key is to improve the efficiency of spectrum utilization and spectrum resources. For optical transmission systems, narrowband filtering effect of fiber loss caused by the window limits the available bandwidth of optical devices and optical transmission path caused by cascade claim maximize spectrum efficiency light transmission; non-linear effect of the optical transmission path optical transmission power requirement maximize efficiency. In addition, the level of light transmission symbol photovoltaic device baseband bandwidth also restricted.

In response to these super-100G optical transmission challenges, solve industry from the following aspects: ① full use of the optical signal can be modulated dimension (amplitude, phase, polarization) to carry data to improve spectral efficiency; ② multi-carrier orthogonal frequency division multiplexing technology to improve spectrum utilization and reduce the transmission rate to suppress symbol dispersion effect, reduce light, electrical parts bandwidth requirements; ③ using digital coherent receiver technology to improve the sensitivity and channel equalization capability of the receiver, using higher gain The error correction coding to improve the robustness of the system. ④ use of advanced optical integration technology to reduce size, lower power consumption and increase system reliability.

It should be noted that, despite the multi-dimensional multi-level modulation can improve spectral efficiency, to reduce the transmission channel and the photovoltaic device bandwidth requirements, but the minimum spacing will reduce the multilevel modulation symbol constellation between sensitivity and lower OSNR transmission damage tolerance capability. Therefore, the selection of higher-level QAM modulation may improve spectral efficiency and transmission rate over 100G, but since the strength of noise and phase noise tolerance diminished capacity, the transmission distance may be much lower than the current system 100G.

Optoelectronic devices integration technology is the basis for ultra-100G optical transmission to achieve. Although the multi-carrier transmission stages can reduce the bandwidth requirements of optical systems, electrical parts, the device power consumption is reduced by the square of the linear growth increase, but the bandwidth and power requirements are still alarming. Optoelectronic devices integrated technology is a key factor Ultra 100G optical transmission design feasibility and system performance.

Given the current business needs and optoelectronic devices technology level, 400Gbit/s optical transmission rate is the most feasible and cost-effective solution. Gemini carrier based on a flexible grid polarization multiplexing 16 quadrature amplitude modulation (2SC-PM-16-QAM) a 400G optical transmission is generally optimistic about the industry one of the options. The program for each transmission channel occupies 75GHz bandwidth and spectral efficiency can reach 5.3bit/s/Hz, compared with 100Gbit/s optical transmission 2bit/s/Hz spectral efficiency can be greatly improved. As a result of more intensive 16QAM modulation, 400G transmission damage tolerance capability (transmission distance) declined compared with 100G optical transmission system, expected to be the first application in the metro and data center interconnect applications.