On the characteristics of optical fiber communication technology and development trends

Abstract: not only can be applied to optical fiber communication backbone communication lines, power can also play a role in communication control system, for industrial monitoring, control, and now the military has been widely applied in various fields based on the growing demand for information , optical fiber communication technology trends are cause for concern. In addition to a complete optical link quality of the fiber itself, but also depends on the fiber link site construction technology and the environment. This paper discusses the main features of optical fiber communication technology and development trends, and link it to fiber-based field testing.

Keywords: characteristics of the development trend of optical communication technology field testing fiber links
1
optical fiber communication optical fiber communication technology is the use of light as an information carrier, optical fiber as the transmission of communication. Can be based on optical fiber communication optical fiber as transmission media as the "wired" Optical Communications. Fiber from the inner core and the cladding composition, the inner core is generally a few microns or tens of microns, thinner than a human hair; the outside layer called the cladding, the role of cladding is to protect the fiber. Optical fiber communication systems is actually not a single fiber, but many of the composition of optical fiber cables together. Is the production of glass fiber as the main material, it is the electrical insulator, so do not worry about ground loops; light in optical fiber transmission, information transmission does not occur in the phenomenon of information disclosure; fiber is very small, occupied by small size, which address the implementation of the space.

2 optical fiber communication technology
2.1 features an extremely wide band, communications capacity. Fiber transmission is much greater bandwidth than copper wire or cable. For single-wavelength optical fiber communication systems, and often restricts the terminal equipment to play not the bandwidth advantage. Therefore need to increase the transmission of technical capacity, dense wavelength division multiplexing technology can solve this problem.

2.2 low loss, long-distance relay. At present, goods and other transmission medium quartz fiber loss compared to the lowest; If in the future use of non-quartz very low loss transmission medium, in theory, the loss of transmission can be reduced to a lower level. This indicates that fiber-optic communication system can reduce the system construction cost, lead to better economic efficiency.

2.3 anti-electromagnetic interference. Quartz has a strong resistance to corrosion, and insulation. And it is also an important feature of the ability of a strong anti-electromagnetic interference, it is not the external environment, also not set up the cable man-made interference. That in the strong electric field for communications applications particularly useful, but also be useful in the military.

2.4 without crosstalk interference, security and good. In the process of radio wave transmission, propagation of electromagnetic waves easily leak, poor security. The light in optical fiber communication, the phenomenon of crosstalk does not occur, confidentiality and strong. In addition to these features, there are small fiber diameter, light weight, soft and easy to lay; fiber rich raw material resources, low cost; temperature stability, long life. Because of these advantages of optical fiber, optical fiber increasingly wide range of applications.

3 growing
3.1 SDH fiber optic communication technology from the beginning of optical communication systems is to send information based on circuit-switched, so customers TDM signals is generally a continuous stream, such as PDH, SDH and so on. With the advancement of technology, especially computer network technology, data transmission is also growing. Packet signal and the characteristics of a continuous stream is completely different, it is uncertain, so send this signal, the optical communication technology to solve problems. And the two transmission equipment is also very different.

3.2 increasing the channel capacity of optical communication systems developed from PDH to SDH, from 155Mb / s development to lOGb / s, recently, 4OGB / s has been achieved commercialization. Experts in the study a larger capacity, such as 160Gb / s (single channel) system has been successfully tested, are also being developed for the corresponding standards. In addition, scientists are still studying the system capacity greater communication technology.

3.3 optical fiber transmission distance from the macro, said optical fiber transmission distance is farther, the better, the study's Researchers fiber, has been efforts in this regard. Put into use in the optical fiber amplifier, there have been a breakthrough on optical fiber transmission distance, the distance to increase the non-regenerative repeater to create the conditions.

3.4 to the development of optical metro backbone network is now the metropolitan area from the development of optical transmission gradually close to the business node. The optical transmission is often considered as a means of transmitting information does not meet the MAN. As a service node, both close to the user, but also to ensure the security of information transmission, optical transmission and the user will also want to bring more convenience services.

3.5 Internet development needs and the development trend of next generation all-optical networks in recent years, the rapid development of the Internet industry, IP services also will be hot. Research shows that with the rapid development of IP industry, communications industry will face a "shuffle", and gave birth to the emergence of new technology. With the further development of software control and development of modern optical communication are gradually intelligent development, it allows the operator freedom of a flexible management of optical transmission. And there will be more related applications emerged, as people use more convenient. Links to Research Papers Download http://www.hi138.com
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