【正文】 c understanding using the actuation the erroneous zone, namely cannot place hopes in artificially studies beforehand develops 12 items socalled “the Assassin39。s mace application”, promoted application. In fact, looking from the telemunication development history, when the work number of users achieved certain scale, each kind of application meets the nature production。 this also is socalled steps the Cuff law might to be at especially. In the history one kind of technology since birth has not been having a big pile of application, regardless of is the mobile munication or the Inter, on its short note, the browsing, the chats and so on the key applications all is develops certain degree after the user scale to produce naturally, but is not sedulously designs beforehand plans. Wide band optical fiber access work superiority Along with the optical fiber in the toll work, the metropolitan area work and even the access work branch section massive applications, the logical trend of development will be continues to the access work to match the line segment and to direct the inlet part to extend, the key is advances the speed quickly? This will be decided by many kinds of factors, including the market demand, the petition need, the application stimulation, the technical progress, the cost drop and necessary will transport Augur system development and so on. Our country in 2020 will hold the Olympic Games and in 2020 holds world expo these two big events to a certain extent to be able to advance the wide band optical fiber access work the development Below mainly will analyze several kind of main wide band optical fiber turning on technology from the system technology angle the characteristic, the question and the trend of development. Certainly, besides the system technology, affects its application the factor to be very many, mainly is the service and the application as well as the control policy. In addition, each kind of necessary primary device technology and the placing installment test technology extremely is also essential. At present the low cost photo source hopefully has realized, 850nm VCSEL only several US dollars, 1310nm VOSEL had the breakthrough, the speed reaches 10Gb/ PLC mix integration technology, the high density low cost optical cable and the correlation technology, uses the optical fiber to the curving insensitive room in, the low cost passive ponent, work the technology, the automatic light operation test system and so on also all is affects the light access work promotion application the key aspect, needs to have the properly solution. The pointtopoint active Ether Because system the cost, the quality, the management, the security and so on many kinds of factors, the Ether still had further to improve as the public work turning on way. The traditional Ether belongs to the user in work (cPN).However its application actually in to include the access work other public work domain expansion. In the history, regarding business user application environment, the Ether technology always is the most popular method, at present has bee only definitely in the power supply receptacle second big housing and the office public facility connection. Uses the Ether is had the huge work foundation and the longterm experience knowledge, at present all popular operating system and the application as the business user turning on method primary cause also all is with the Ether patible, the performance price pared to good, the extendibility, easy to install the clear as well as redundant reliable and so on. Regarding the public work housing user application environment, the pointtopoint active Ether system uses the active service focus point to substitute the passive pointmultipoint system the passive ponent, enables the transmitting range to be possible to expand to 1 20 kilometer far. The main merit is specialpurpose turning on, the band width has the guarantee, each user may monopolize 100Mb/s and even 1dbs。 Bureau end equipment simple cheap。 The transmitting range is long, the service area is big。 But the cost the linearity increases along with the number of users actual growth, does not need to plan, the investment risk is low, thus disperses the local cost in the low density user to be low. The shorting is the both sides equipment and the optical fiber facility specialpurpose, the user cannot share the bureau end equipment and the optical fiber, when the demand fast growth also the user are very crowded, optical fiber and both sides equipment quantity and cost as well as spatial demand also along with it rapid increase, thus not too suits the high crowded user region. The influence choice Ether technology another factor is the traditional video frequency service provides the way, for example American Place Bell Company all pledged provides the tradition to simulate the RF video frequency program, but the Ether and the simulated video program mix is very difficult. This aspect PON technology quite is easy. Because the cost, the quality, the management, the security and so on many kinds of factors, the Ether still had further to improve as the public work turning on way. Mainly is the Ether technology inherent mechanism does not provide the endtoend package time delay, the package loss rate, the band width control, supports the realtime service with difficulty the grade of service, lacks the safety mechanism guarantee and so on. Pointmultipoint passive, light work system Along with IP rising with the development, some people proposed the EPON concept, this thought obtained the positive response in the Ether, has already formed the GEPON standard in under the IEEE flag. 1. Passive light working Passive light work (PoN) is one pure medium work, its main characteristic has removed the active equipment in the access work, thus has avoided t