2022年完整word版,Opticalfibercommunicationtechnology .pdf
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1、Optical fiber communication technology Pick to: optical fiber communication is to light as the carrier of information, with the optical fiber as transmission medium is a means of communication, has become one of the main pillars of modern communication. This article introduced our country fiber comm
2、unication several key technology and its current situation and further development of the road. Key words: optical fiber communication; current situation; way out Abstract from the optical communication of optical fiber communication technology talent showing itself, has become one of the main pilla
3、rs of modern communication in the information society, is a variety of information network is the main transmission means in the modern telecommunications network, play a decisive role in the. Optical fiber communication, as an emerging technology, rapid development in recent years, applications bro
4、ad range of communications in history, but also the important symbol of revolution of world new technology and the future information society information main transfer tool. In 1, an overview of optical fiber Optical fiber for optical fiber abbreviation. Optical fiber communication is to light as th
5、e carrier of information, with the optical fiber as transmission medium is a means of communication. In principle, constitute the basic elements of optical fiber communication optical fiber, a light source and a light detector. Optical fiber in addition to the manufacturing process, material composi
6、tion and optical properties 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 1 页,共 11 页 - - - - - - - - - for classification, in the application of the optical fiber, used to use for classification, can be divided into communication and optical fiber sensor with optica
7、l fiber. Transmission medium optical fiber is divided into general and special two, and functional devices for optical fiber refers to the amplification, shaping, frequency divider, frequency, modulation and optical oscillation features such as optical fiber, and often a function of the device appea
8、red in the form of. Optical fiber communication is developing rapidly, mainly because of the fact that it has the following advantages:1) the communications capacity, transmission distance;2) the signal crosstalk small, good secrecy performance;3) resistance to electromagnetic interference, the tran
9、smission quality is good;4) fiber has small size, light weight, convenient installation and transportation;5) and rich material source, environment protect;6) no radiation, difficult to tapping;7) cable strong adaptability, long life. 2, optical fiber communication system Currently used in the optic
10、al fiber communication system, is widely used in digital coding, intensity modulation - direct detection communication system. This system schematic diagram as shown below 3, optical fiber 3.1 in accordance with the refractive index distribution of different points Is commonly used in step-index opt
11、ical fiber and graded fiber two. The 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 2 页,共 11 页 - - - - - - - - - (1) the step type optical fiber (2) graded fiber 3.2 according to the total transmission module. The so called pattern, is essentially a form of electroma
12、gnetic field distribution. Patterns are different, its distribution varies, according to optical fiber transmission mode number to points, can be divided into single-mode fiber and a multimode fiber. The single mode fiber (1) ( SM-Single mode fiber ) Multimode optical fiber (2) ( MM-Multi mode fiber
13、 ) 4, the current situation of the development of optical fiber communication technology Optical fiber communication depends on the development of optical fiber communication technology. At present, optical fiber communication technology has made great progress, new technology is ceaseless emerge in
14、 large numbers, then greatly improve communication ability, and expanding the scope of application of optical fiber communication. 4.1wavelength division multiplexing technology Wave division multiplexing WDM ( Wavelength Division Multiplexing ) technology can make full use of single-mode fiber low
15、loss zone to bring the huge bandwidth. 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 3 页,共 11 页 - - - - - - - - - According to each channel optical frequency ( or wavelength ), the fiber with low loss window is divided into a number of channel, the light as the sign
16、al carrier, the sending end uses wavelength-division multiplexer ( multiplexer ), different specified wavelength optical carrier signal is combined into one optical fiber transmission. At the receiving end, again by a wavelength division multiplexer ( ODU ) these different wavelength light carrier s
17、eparated bearing different signal. Due to the different wavelength of the optical carrier signal can be considered as independent of each other (not considering the fiber nonlinear time ), resulting in a fiber can be realized more road of the multiplexed optical signal transmission. Since the end of
18、 last century, wavelength division multiplexing technique appeared, because it can greatly improve the transmission capacity of optical fiber transmission system, quickly and has been widely used. Since 1995, in order to solve the problem of large capacity, high speed and long distance relay transmi
19、ssion problems, dense wavelength division multiplexing ( Dens DWDM Wavelength Division Multi-plexing ) technology has become one of the main research objects. DWDM optical communication system has greatly increased in each pair of optical fiber transmission capacity, economically and effectively sol
20、ves the bottleneck problem of communication network. According to statistics, by the end of 2002, commercial DWDM system transmission capacity has reached 400Gbit / s. In 10Gbit / S based DWDM system has gradually become the mainstream of core network. DWDM system in addition to wavelength number an
21、d transmission capacity increases ceaselessly, optical transmission distance from 名师资料总结 - - -精品资料欢迎下载 - - - - - - - - - - - - - - - - - - 名师精心整理 - - - - - - - 第 4 页,共 11 页 - - - - - - - - - 600km around substantially expanded to more than 2000km. At the same time, along with the wave division multi
22、plexing technology in long distance network to metropolitan area network expansion, coarse wavelength division multiplexing ( Coarse CWDM Wavelength Division Multiplexing ) technology emerge as the times require. CWDM channel spacing for general 20nm, by lowering the wavelength window requirements a
23、nd achieve full wavelength range (1260nm 1620nm ) wavelength division multiplexing, optical devices and greatly reduced cost, can be realized in0km 80km high price performance ratio, thus by the operators welcome. The 4.2optical access technology Optical fiber access network is the information highw
24、ay the last one kilometer. To realize the information transmission speed, meet the needs of the public, not only have broadband backbone transmission network, user access is a key part of the optical fiber access network, high-speed information flows into thousands of households is the key technolog
25、y of. In the optical fiber broadband access, due to optical fiber to a different location, FTTB, FTTC, FTTCab and FTTH of different applications, referred to as FTTx. FTTH ( fiber to the home ) is an optical fiber broadband access ultimately, it provides full access, therefore, can make full use of
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