Before I wrote a blog a little bit of industry experience, and now find themselves too shallow, the following analysis refer to the real experts say, on the one hand so that his good learning, on the other hand can bring their friends to give greater .
Recently, the China Institute of Communications of the Sixth National Congress of the academic report meeting, Wuhan Institute of Posts and Telecommunications Mao Qian optimistic forecast of experts, along with advances in telecommunications technology and market expansion, will usher in optical communications a new round of development, described as OTN higher and higher requirements, but also for the development of optical communication has brought new opportunities. According to statistics, until now, the global total of some 700 million laying fiber optic cable core km; the end of 2007 is expected to reach 8 million core km. to the end of December 2006, the length of fiber cable in China, 426 million km, fiber length of more than 100 million kilometers. open wire, cable almost all disabled, microwave line length is only 20 million km. of more than 95% of the amount of information transmitted through the optical network.
Mao Qian said that in 2005 global sales of 68 million km fiber than 58 million km in 2004, up 15%; fiber sales in 2006 of about 9000 million km, compared with growth of about 2005 32% in 2010 to reach 113 million km .SONET / SDH optical devices is estimated that in 2006 exceeded 5 billion U.S. dollars, 2005-2008 estimated average annual growth rate of 20.7%; WDM optical components of output in 2006 exceeded $ 500,000,000 2005 to 2008, average annual growth rate projected at 29.2%. access light module 2008, output value over 10 billion U.S. dollars, 2009, the optical components market will reach 4.38 billion U.S. dollars. optical transmission equipment market in 2005 was 7.0 billion USD 7.7 billion in 2006, is expected to reach 10 billion U.S. dollars in 2008. At the same time, the domestic optical communications market recovery in the case also appeared .2006 31.2% sales growth in the domestic fiber, about 20 million km. Domestic Cable 44% sales growth, optical transmission equipment market in 2005 was 122 billion yuan in 2006 about 140 billion yuan, up about 15%.
Mao Qian that the long-distance transmission network is toward high-speed, large capacity, ultra-long-distance direction. in the ultra high-speed connection, Bell Labs in 1999 to complete a 160Gb / s electrical time division multiplexing optical transmission experiments; NTT in 1998 completed a 640Gb / s transmission experiment 63 km, 100 km in 1999 to reach a .40 Gb / sSDH practical instrument already. China in 2004, the system achieved 40Gb/sSDH G.652 and G.655 fiber at the 560 km transmission without regeneration. every indication that, 40Gb / s experimental and commercial systems in the world was accelerated. In the large capacity, the last two years rapid development of optical communication systems. In China, 160t10Gb / s DWDM systems have been large-scale commercial; 80t40Gb/sDWDM system in 2005 opened in Shanghai to Hangzhou. NTT succeeded in September 2006 demonstrated the 14Tb / s of DWDM optical transmission systems, the wavelengths of 140, rate per wavelength to 111Gb / s, transmission distance of 160 km; in March of this year, Alcatel-Lucent announced the successful realization of the single fiber 25.6Tb / s transmission rate. in the ultra-long distance, the international level has reached 3.73Tb / s system transmission 11,000 km, 6.4Tb / s 3200 km transmission system; national level 160t10Gb/sDWDM transmission system without regeneration 3040km, expandable up to 5000km.
Mao Qian said that in recent years is also very active in MAN technology. MSTP, RPR, MSR, CWDM development speed very quickly. especially the MSTP, SDH was originally based on the increase in broadband access, data services transparently ; then is to increase the data processing business, including the Ethernet layer switching, ATM switching, etc.; After that using the ring network technology, improve bandwidth utilization, including RPR, VPRing etc.; currently under the direction of the dynamic development of intelligent, intelligent features, automatic topology discovery, bandwidth, application and release of dynamic, flexible and efficient protection. In addition, 100G Ethernet transmission began to emerge, IEEE is developing related standards, last year's ITU Telecom Hong Kong has such technology display, in the existing 40G networks to a 100G Ethernet transmission.
Mao Qian that the light-home (FTTH) is a great potential for development of technology by the end of .2006, Japan already has 810 million FTTH users, ADSL has been negative growth in Japan in 2010 will reach 17 million FTTH users. the United States has also been the third quarter of 2006, 100 million FTTH subscribers in Europe in late 2005 with 665,000 FTTH users may have reached the end of 2006 1610000. FTTH main technologies used by P2P, NPON, APON, EPON, GPON, HFC, PLC and so on. which is widely used in the three technologies P2P, EPON, GPON applications have their own adaptation. now, 2.5G EPON has emerged, chip makers have developed EPON, GPON-compatible ASIC. to the end of the ITU Telecom World Hong Kong manufacturers on display at the WDM-GPON. but from the practical point of view at this stage, EPON interoperability test results compared ideal, GPON test results and expected a larger gap.
the device, gross Qian said, miniaturization, integration, wide temperature range, hot plug is the device's development trend. As sharp decline in the price of the device , VCSL device uncertainty. FTTH with a variety of small, single fiber bi / three-way, sudden emergence of a large number of transceiver modules. the main direction of development in this area are: to improve the work rate increases optical power to issue and improve the light receiver sensitivity, reducing the insertion loss, reduced reflection; addition will further reduce costs.
Finally, Mao Qian describes the development trend of optical fiber and cable field. In his view, optical fiber and cable prices have fallen to the lowest valley, some factories have closed, merged, turning, will remain relatively stable recently. made fiber, a cable technology is quite mature, the field began to labor-intensive high-tech transformation. G.652 fiber is still a lot of use. plastic optical fiber as The new hot spot, but the discrepancy from the utility. photonic crystal fiber in the ascendant, used for application of the device or special advantage, but is inconclusive whether the alternative to standard fiber.
No comments:
Post a Comment