发布时间 : 星期三 文章光纤通信的发展趋势探讨+本科毕业论文 - 图文更新完毕开始阅读5d62808671fe910ef12df80a
sent by the modern means of communication point to point. The birth of optical fiber communication technology and in-depth information and communication in the history of the development is an important reform. Optical fiber communication technology from theory to the field of engineering technology, to achieve today’s high-speed optical fiber communication, before and after the experience of several decades.
The beginning of the sixties of last century fiber optic communication technology at the beginning of foreign origin, was developed by the fiber loss up to 400 dB / km, and later, the British Standards Institute proposed telecommunications, in theory, the fiber loss can be reduced to 20 dB / km Then, the Japanese followed the loss of developed optical fiber is 100 dB / km, Corning developed the powder method based on loss of 20 dB / km below the quartz fiber, to the nearest Ge-doped silica fiber loss down to 0.2 db / km, close to the quartz fiber loss limit proposed in theory.
The above course of development of optical communications technology, optical fiber communication technology can be broadly divided into five stages, namely the 850 nm band multi-mode light to 1310 nm multi-mode fiber to 1310 nm single-mode fiber, and then to 1550 nm single mode optical fiber, and finally the long-distance optical fiber communications technology for transmission.
3, the status of optical fiber communication technology
(1) optical fiber communication technology in wavelength division multiplexing. The WDM, full use of the advantages of single-mode fiber low-loss area, get a big bandwidth. Each channel wavelength division multiplexing technology is based on the frequency and wavelength of light of different circumstances such as starting, the low-loss optical fiber window planning for a number of separate communication channels set in the transmitter wavelength division multiplexer, the different wavelengths signal set together into a single fiber, the re-transmission of information, while the receiving end of wavelength division multiplexer carries a variety of these different signals, the wavelength of light of different carrier and then separated.
(2) optical fiber communication technology in optical access technology. Optical access network technologies in information transmission technology of a new attempt, which implements a universal Shang’s high-speed information transmission, to meet the majority of people in the requested information transmission Su Du, Zhu Yao’s backbone transmission network by the Kuandai and user access to two Bufen composition. The latter plays a more crucial role, namely, FTTH (fiber to the home means), fiber-optic broadband access as a last
- 2 -
resort, responsible for completing the important task of all-optical access, optical fiber-based broadband-related features, for communication receivers end users with unlimited bandwidth required.
4, the development trend of optical communication technology
Here will go a long way in the future development of several optical fiber communication technology, as shown in Figure 1.
3, the status of optical fiber communication technology
(1) optical fiber communication technology in wavelength division multiplexing. The WDM, full use of the advantages of single-mode fiber low-loss area, get a big bandwidth. Each channel wavelength division multiplexing technology is based on the frequency and wavelength of light of different circumstances such as starting, the low-loss optical fiber window planning for a number of separate communication channels and transmitter set wavelength division multiplexer, the different wavelengths signal set together into a single fiber, the re-transmission of information, while the receiving end of wavelength division multiplexer carries a variety of these different signals, the wavelength of light of different carrier and then separated.
(2) optical fiber communication technology in optical access technology. Optical Access Network technology for information transmission technology of a new attempt, which implements a general sense of the speed of information transmission, the general public to meet the requirements of speed of information transmission, mainly by broadband backbone transmission network and user access to two composition. The latter plays a more crucial role, namely, FTTH (fiber to the home means), fiber-optic broadband access as a last resort, responsible for completing the important task of all-optical access, optical fiber-based broadband-related features, for communication receivers end users with unlimited bandwidth required.
4, the development trend of optical communication technology
Here will go a long way in the future development of several optical fiber communication technology, as shown in Figure 1.
(1) further development of optical access network communication technology. Existing technology is still twisted-pair copper access network connection, is still primitive, backward simulation systems, network optical access technology to become fully digital, intelligent and highly integrated network
Optical access network communication technology to achieve the main objectives are: to
- 3 -
enable the greatest degree of maintenance is reduced, failure rates have decreased; can be used for new equipment development and new income increasing; and local networks combined to reduce the node The purpose of the number and scope of coverage; through the establishment of optical networks for multi-media era prepared; In addition, you can maximize the use of optical fiber itself features a number of advantages.
(2) optical fiber communication technology in the optical transmission and switching technology, communications technology, optical access network convergence after a delay. The optical access network based on the maturity of the development of communication technology, the network’s core architecture has been turned upside down and is developing the rapid changes in the exchange and transfer, both in terms have also been carried out for generations to date. Optical networks and optical transport and switching technology, fusion technology, the former than the latter in the technology application has some technical improvements, which also improves the whole network to further forward the effective development, but the technology is relatively speaking is still not mature.
(3) a new generation of optical fiber communication technology in the application. Traditional sense of the G. 652 single-mode fiber has been long and ultra-high speed transmission networks showed inadequacies in the shortcomings of a new generation of fiber-optic research and development has become the pragmatic need, it also constitutes a new generation of network infrastructure Construction work is an important part. In the current route network and generally needs the context of MAN, based on different development needs, has developed two new generation of fiber a non-zero dispersion fiber, and full-wave fiber.
5 Conclusion
Optical fiber communication technology is now as an important one of modern information transmission technology, social background, now the information obtained on the application of universal significance, and Xiangguan in Quanqiu communications industry in the state of the world when Chuyufeichang Dimi, optical fiber communication technology still got some development. In accordance with the current of communication technology in China’s development mode, optical fiber communication technology will replace all other of information transmission, Er and become the mainstream of the development of communication technology, and lead mankind to the All-Guang Shi Dai!
(1) further development of optical access network communication technology. Existing technology is still twisted-pair copper access network connection, is still primitive, backward simulation system, optical access network technology make it an all-digital, and highly
- 4 -
integrated intelligent network.
Optical access network communication technology to achieve the main objectives are: maximum to be lower maintenance costs, failure rates have decreased; can be used for the development of new equipment and new revenue increased; combined with the local network, to reduce the node The purpose of the number and scope of coverage; through the establishment of optical networks, the arrival times for the multimedia ready; In addition, to maximize the use of optical characteristics of its several advantages.
(2) optical fiber communication technology in the optical transmission and switching technology, communications technology, optical access network convergence after a delay. The optical access network based on the maturity of the development of communication technology, the core of the network architecture has been turned upside down and is developing rapid changes, both in terms of switching and transmission have also been updated for several generations. Optical networks and optical transport and switching technology, fusion technology, the former than the latter in the technology application has some technical improvements, which also improves the whole network to further forward the effective development, but the technology is relatively speaking is still not mature.
(3) a new generation of optical fiber communication technology in the application. Traditional sense of the G. 652 single-mode fiber has been long and ultra-high speed transmission networks showed inadequacies in the shortcomings of a new generation of optical fiber research and development has become the pragmatic need, it also constitutes a new generation of network infrastructure Construction work is an important part. General demand in the current network and metro lines in the context, based on different development needs, has developed two new generation of fiber a non-zero dispersion fiber, and full-wave fiber.
- 5 -