optical communication technology under the 2011 debt crisis, the Japanese earthquake and nuclear leaks, flooding in Thailand, Libya war and a series of adverse social and economic environment, to maintain one of the few technology for sustainable development. Global optical communications equipment market is expected to grow 7% over 2010; estimated global fiber market growth will exceed 10%, optical fiber shipments will more than 200 million kilometers; optical devices in the first half of 2011 there are some growth in the second half mediocre, but estimated foreign sales of major optical components suppliers are still 10% -20% increase. From a technical point of view, optical communications technology has greater progress than in 2010.
Ultra-high speed, large capacity,
Research progress rapidly over long distances
At present, the mainstream of core network equipment is based on 10Gb /s of DWDM, based 40Gb /s of DWDM equipment and small-scale commercial systems have started at home and abroad, based 100Gb /s DWDM system has built in test projects abroad, domestic mainly in the testing and validation phase. In order to adapt based on Super Channel (mouthfulpercows) applications in DWDM, relevant and flexible grid technology research being carried out. To meet the PTN packet transport technology has been large-scale applications online; packet OTN technology under development. In addition, in the laboratory of ultra-high speed, large capacity, ultra-long-range technology research progress faster. For example, the rate of single-source Super Channel has reached 26Tb /s, equivalent to the amount of data transmitted within 1 second to about 700 DVD disc. The maximum capacity of a single fiber of commercial systems still below 10Tb /s, while the laboratory has exceeded 100Tb /s mark, reaching 108.76Tb /s, equivalent to within 1 second can be transmitted 20,000 Britannica. Commercial standards based on a single span of 10Gb /s DWDM systems up to 160km, individual lines reach more than 200 km; and the laboratory level is 40 & instances; maximum span 112Gb /s, the system reached 365km, to solve the power of communication and offshore land - island occasionally Island - communication between the island and create favorable conditions. Commercial land-based 10Gb /s DWDM system transmission without electrical regeneration generally does not exceed a maximum distance of 4000km; the maximum distance in the laboratory, 10.7Tb /s (96xl12Gb /s) PDM-RZ-QPSK signal transmission without electrical regeneration has reach 10608km, in order to simplify the construction of transoceanic optical communication system and maintain the foundation. In a related study of domestic and foreign aspects of the whole there is a big gap, but also a breakthrough on individual items. Domestic single source Super Channel (mouthfulpercows) the rate reached only 2Tb /s, while the maximum capacity of a single fiber in a single C-band reached 30.72Tb /s (16 & instances; 1.92Tb /s), which is in the current international Single-channel C-band to achieve the highest rate, the total capacity of the largest DWDM systems. December 5, 2011, Wuhan Research Institute of Posts and Telecommunications in the State Key Laboratory, successfully 240Gdiscernment /s coherent optical orthogonal frequency division multiplexing (OFDM) signal on an ordinary single-mode fiber 48 km error-free real-time transmission, which is Ultra-high-speed optical communication transmission experiment with the international's first online real-time processing to achieve ultra 100Gb /s. Our competitive optical communications industry has also been rising, in the "2010--2011 annual global optical communications 10 most competitive enterprises" list, Chinese companies accounted for three seats (Huawei, ZTE, war communications), Huawei ZTE and Fiberhome were ranked first, fourth and ninth.
The key technology of optical devices
Fiber broadband access technology
The rapid development of
2011 is the international fiber-optic broadband access rapid development of the year, Japan's FTTH subscribers in the end of June 2011 reached 20.93 million, South Korea continues to maintain the first position in the global FTTH penetration. fludropdenedRfavoanulusductionumichorg comment on the article pointed out that China will be the global FTTX construction center. FTTX construction is expected in 2011 China accounted for one third of global volume. Our three major telecom operators are building FTTX continue to force, China Telecom PON Central Purchasing 19 million lines, with the home gateway, the scale of 2.5 billion yuan; China Mobile tender PON800 million lines, the scale of 900 million yuan; China Unicom Bidding PON equipment up to 25 million lines, the size of 25 billion yuan, since the FTTH construction start bidding largest one. Summary of view, the amount of bidding in 2011 China's three major telecom operators PON has reached 52 million lines and 60 million, plus the province's self-built, in 2011 the market demand for optical fiber access network equipment 9 billion yuan - 10 billion yuan, nearly doubled in 2010. Due to the rapid decline in costs, from 2011, fiber direct to home (FTTH) began to increase the proportion, the only Watson Wchangeorganisation sea to achieve 1.3 million FTTH subscribers, China Telecom is expected by the end of 2011 FTTH subscribers will exceed 5 million. From a technical point of view, large-scale application of optical access technology is still GEPON, but since 2011, bureauN into the large-scale application. 10GEPON technology and industrial chain have matured enough to be commercial in scale, from the price perspective, its price is expected to be at the end of 2012 compared to GEPON up only 5% -20%. Although 10GEPON devices has begun shipping, mainly construction test project, no large-scale application market. 10GbureauN technological development in two phases, XbureauN1 and XbureauN2. XbureauN1 standard G.987 series was released in October 2010, XbureauN2 because it does not consider the current network ODN and coexistence will be difficult to achieve smooth network upgrade. Since the main FPGA chip XbureauN1 still in a stage, so it is difficult to support large-scale commercial use. In the laboratory, in addition to the WDM-PON, 40Gb /s and 100Gb /s of TDM-PON, OCDM-PON, OOFDM-PON, PON coherent technology and other technologies in a study, the development direction of 10bureauN later, It is not very clear. For the passive optical distribution network ODN ease of installation, maintenance and management, with intelligent ODN systems are also under study.
Rods made fiber cabling technology
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Mature
China has become the world's leading optical fiber and cable market and the world's largest optical fiber and cable manufacturing country, has made remarkable achievements. In - global optical fiber and cable list "2010 2011 global optical communications 10 most competitive enterprises" list of the top 10 seats have three belong to China (a long fly, prosper, the flames of communication), which ranked a long fly The first two, prosper, and the flames of communication points out the first five and six. By the end of 2011, China has laid optical fiber 400 million core km total, only 2011 Fibre amount reached 90 million to 100 million km. It is reported that, until the end of 2011, a total of 17 fiber optic companies, a total of 159 sets of optical fiber drawing machine drawing optical fiber production line, 279. Currently a total capacity of about 1.25-1.4 one hundred million core km, and there is no domestic fiber expansion boom faded sign. Currently, rods, manufactured fiber, a cable technology is already quite mature. Formerly a high-tech fiber optic cable manufacturing trend towards labor-intensive transformation. Our production in 2011 is estimated to reach about 1,400 tons preform can meet about 40 percent of domestic demand. However rods, drawing some of the major raw materials and gas needed mainly rely on imports, a controlling stake in many rods companies are still rests in the hands of foreign companies, which are made of domestic enterprises the right to speak in rods, drawing aspect is not strong. The current main application is still online G.652 fiber (such as G.652D), the G.657 fiber in FTTH applications has also begun. At present the main technological research are: how to make G.654 fiber can also be used in the land; the need to standardize and increase G.652E G.657A3 fiber fiber standards. This year the plastic optical fiber has become a new hot spot, but in the communication network from practical applications are still gaps in specific areas for cars, boats, military, computer networking and so have some indoor application prospects; photonic crystal fiber in the ascendant, used to make the device or special applications have an advantage, but can replace standard fiber inconclusive.
There are still gaps
China is becoming the world's most active optical components market, currently occupy 20% -25% share of the global optical components market, in 2011, the domestic optical components market income of about 10 billion yuan, an annual growth rate of about 15%. International research on photonic integrated devices more emphasis on 10 & instances InP technology; 10Gb /s monolithic DWDM photonic integrated transceiver devices already commercially available; 10 & instances; 40Gb /s monolithic DWDM photonic integrated transceiver devices have come out; the next step The goal is to adapt to flexible grid technologies 10 & instances; 100Gb /sPM-QPSK flexible channel integrated photonic devices. Further larger capacity (eg 25Tb /s) photonic integrated device flexible channel photonic integrated devices and a study coherent receiver technology. In commercial terms, domestic and 40Gb /s optical transceiver modules are already quite mature, we can provide commercial. International community has already announced that its 100fcrucifymebureaue coherent optical module from the second quarter of 2012 put into commercial, domestic 100Gb /s optical transceiver module is also being developed. For the domestic FTTH PLC splitter 1:128 may have commercial 1:256 splitter also coming soon. But worth mentioning is that both optical passive or active optical devices, high-end key chip technology still rests in the hands of foreign companies, so that the domestic production of high-end devices are severely constrained.
As China's & ldquo; broadband China & rdquo; the national strategy will be launched, broadband will further accelerate the process, 3G, LTE will enable the continued development of optical communication technology to get faster and greater development, increase high-end research and development investment, master the core technology is our top priority, look forward to supporting the government greater intensity, called on the optical communication industry colleagues to work together.
