On the development of optical fiber communication status and prospects

[Abstract] optical fiber communications, because of its low loss and transmission frequency bandwidth, large capacity, small size, light weight, resistance to electromagnetic interference, crosstalk, etc. is not easy, much favored by the industry to develop very rapidly. Currently, optical fiber cable has been wired into all areas of communications, including posts and telecommunications, radio communications, power communications and military communications. Overview of Optical Fiber Communication Research and Development.

[KeyWords] optical fiber communications access network, core network all-optical soliton communication network
recent years, optical fiber communication technology has developed rapidly, new technologies are emerging, it has greatly improved communication capabilities and optical fiber communication expanding range of applications.


First, the status of the Development of optical fiber and cable

1.

Ordinary optical fiber is the most common single mode optical fiber as a fiber. With the Development of optical communication systems, optical distance relay and a single wavelength channel capacity increases, G. .652. A fiber may also further optimize the performance, the performance in the areas of low attenuation coefficient 1550rim not been fully utilized and fiber the lowest attenuation coefficient and the zero dispersion point not in the same area. Comply with the provisions of the cutoff wavelength shift ITUTG.654 single-mode fiber and in accordance with provisions of G. .653 dispersion shifted single-mode fiber to achieve such improvements.

2.

Core network of fiber optic cable in trunk (including the national trunk lines and local lines in the province) on the comprehensive use of fiber optic cable, including multi-mode fiber has been eliminated, all with single-mode fiber, including G. optical fiber and G. .655 .652. G. .653 Although fiber has been introduced in our country has, but it will be no more Development. G. .654 fiber because it can not be substantially increased capacity of fiber optic systems, it is not our land fiber optic cable used. Route the fiber cable in the discrete, non-use of optical fiber ribbon. Trunk cable is mainly used outdoors, in the cable, the sleeve was used Stranded and skeletal structure, has been suspended.

3.

Access network cable from the cable access network in short, many branches, drop frequently, in order to increase network capacity, often to increase the number of fiber core. Especially in the city pipes, the diameter of the pipe is limited, increasing the number of fiber core and increase container density fiber optic cable, cable diameter and weight reduction is very important. Access network G. .652 single mode fiber and G. .652. C with low water peak single-mode fiber. Low water peak single-mode fiber for dense wavelength division multiplexing, is currently in China has a small amount of use.

4.

Indoor fiber optic cable fiber optic cable is often required for both indoor voice, data and video signal transmission. And also may be used for telemetry and sensors. International Electrotechnical Commission (IEC) under the category of indoor fiber optic cable fiber optic cable, I believe that Council should at least include cable and fiber optic cabling with two parts. Bureau of cloth on the central office with a cable or other telecommunications equipment room, laying close orderly and relatively fixed position. Wiring cables with cloth on the client's room, mainly used by the user, the vulnerability of its Board with the cable than there should be more stringent consideration.

5. Power lines in the optical cable is a dielectric
fiber, optical cable can also be made whole media is no metals. This all dielectric fiber optic cable would be the ideal power system communication lines. Power poles Road for laying fiber optic cable all the media, there are two structures: the all-dielectric self-supporting (ADSS) for the overhead structure and to line the winding structure. ADSS fiber optic cable laying their ability to separate, wide, in the current transformation of China's power transmission system has been widely used. ADSS fiber optic cable in the domestic demand for greater near-term, is a popular product. Links to Research Papers Download http://www.hi138.com