Development trend of fiber cabling technology in new generation data center

In the last 5-6 years, the construction of China's data center is at a stage of rapid growth, and according to the forecast of Ami of the third party investigation organization, in the next 5 years or even longer period, the construction of domestic data center will continue to be in the fast growth channel, according to the report shows, Asia-Pacific Data Center Wiring Market Composite annual growth rate will reach 32.8%, China's composite annual growth rate is expected to reach 37.5%, than the overall integrated wiring market, the composite annual growth rate of 23.9, China's 2011 Data Center Cabling Market size will be expected to reach 91 billion yuan.

China's domestic traditional wiring market in recent years by the international wiring brand completely lead the phenomenon gradually evolved into domestic brands and international brands rival pattern, while in the data center wiring market, especially large and medium-sized data center wiring market, according to statistics, 70% Market Share by the Professional data center in the field of international wiring brand about 5-6 brands to form an oligopoly market. Because the data center wiring market is specialized to the product, the product quality and the reliability request is far higher than the traditional wiring market, especially the optical fiber product application technology, the wiring brand still has the quite disparity, but the large-scale data center project construction and the application, has promoted the optical fiber wiring product technology development greatly, To the data center fiber wiring will put forward the new higher request, and produces the new technical topic to promote the data center wiring Technology development, directs the data center wiring product technology direction to produce the mainstream effect in the wiring market.

First, the application and development of optical fiber technology

Data center cabling systems need to continually increase bandwidth, paving the way for fast-growing networks (such as core-tier networks, converged networks, and SAN storage networks), while fibre-optic transmission can provide the potential to continuously exploit bandwidth. Compared with single-mode fiber, because of the low active + passive integrated cost of multimode fiber, it will make multimode fiber have the absolute advantage in the application of data center, and more than 85% of the fiber cabling system in large and medium data center adopts multimode fiber. August 2009, TIA officially approved OM4, a new category Eia/tia492aaad Multimode optical fiber standards for the introduction of multimode fiber in the future a large number of applications to provide a good development prospects for multimode fiber from OM1 to OM2, Using Vcsel laser optimization technology after the OM3 to OM4 a full development of 4 stages, the bandwidth is gradually increased, the level of bandwidth and 10G transmission distance corresponds to the following figure (1).

With the June 2010 IEEE 802.3BA new Ethernet 40g/100g standard released, Multimode fiber in the field of data Center application will turn over a new page, 40G and 100G high-speed transmission is no longer only rely on the single mode of high cost WDM serial transmission, the next generation of Ethernet 40G The/100g standard will use the OM3 and OM4 multimode fiber multi-channel parallel transmission mode, compared with the mode of single mode WDM serial transmission, the total cost of 40g/100g (including active devices, optical modules, passive devices) is only 1/3 and 1 of single-mode system respectively. 10, visible multimode advantage is very obvious, market application trend is usually by cost and price factor to drive and decide which technology model can take the biggest application in the market.

Multimode fiber 40G transmission mode with each pair of optical fiber support 10Gbps speed 4*10gbp=40gbps, need to use each 4 fiber send and receive a total of 8 core fiber, 100G using each 10 fiber send and receive 10*10gbps=100g, a total of 20-core fiber, The use of standard MTP/MPO multi-core connection system will be able to better support the new generation of optical network 40g/100g transmission, 40G and 100G in Multimode transmission mode as shown in the following figure (2), 40G transmission mode is in the 12-core Mtp/mpo connector to take the most external sides of the 4 core transmission, The Middle 4 core is vacant, and the 100G transmission mode is to use two 12 core Mtp/mpo connector to take the middle 10 core transmission, if uses Mtp/mpo high-density 24 core connector, then completes 100G receives and sends in a 24 core Mtp/mpo connector. 100G transmission, each of the 12 cores on both sides of each of the 1 cores in the vacant state.

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