Technology of China's optical fiber and cable
In recent years, optical fiber communication technology has been considerable development, new technologies are emerging, which significantly increased the communication capabilities, and optical fiber communication expanding range of applications.
1, ordinary optical fiberOrdinary single-mode fiber is the most commonly used fiber. With the the development of of the optical communication system, the the distance of the optical repeater and the a single wavelength letter Tao capacity increases, G. The .652. The the A, fiber-optic of of the performance there are the may to further optimize the, the performance of in the the the low attenuation coefficient of the the 1550rim Ou did not can be fully utilized and fiber optic the minimum attenuation coefficient and the zero dispersion point is not in the same region. The cutoff wavelength meet the ITUTG.654 provisions shifted single-mode optical fiber and the .653 G. The provisions of dispersion shifted single-mode fiber to achieve such improvements.
2, the core network fiber optic cableChina has in the of Route (including that the full adoption of on the the national trunk, the province trunk lines and in the region of Route) fiber optic cable with, of which to multi-multimode fiber have been eliminated, used in all the single-mode fiber, including the G. The .652 fiber-optic and G. .655 fiber-optic. G. The .653 fiber in our country has adopted, but will not develop in the future. .654 Fiber-optic in G. The because of its can not very greatly increase the capacity of the fiber-optic system, it in the in the the land-based fiber optic cable of the our country's there is no to use Guo. The trunk cable using discrete fiber, optical fiber ribbon. Of Route fiber optic cable is mainly used for the outdoors, in the the in these fiber optic cable, the once use Guo of the tight sets of layer stranded-style and skeleton--style structure, the current has been to stop using.
3, the access network cableShort distance from the fiber optic cable in the access network, multi-branch and drop frequently, in order to increase network capacity, is to increase the fiber count. In particular, the yes the in pipeline in the city, in the, due to to to the limited inner pipe diameter, in the increase the at the same time of the the the number of of fiber-optic core increase the fiber optic cable fiber-optic set installed density, reducing the fiber optic cable diameter and weight, is the the it and in order to a very important. The access network G. The .652 ordinary single-mode fiber and G. .652 C, low water peak single-mode fiber. The low water peak single-mode fiber for dense wavelength division multiplexing, in China has a small amount of use.
4, indoor fiber optic cableIndoor fiber optic cable is often required for the transmission of voice, data and video signals. And may also be used for telemetry and sensor. International Electrotechnical Commission (IEC) referred to in the fiber optic cable classification of indoor fiber optic cable, I believe that should include at least Bureau of cable and wiring of two major fiber optic cable. Office cable laying on the central office or other telecommunications room, laying close orderly and relatively fixed position. The combination of the wiring cable laying on the client's indoor, mainly used by the user, so its vulnerability should be higher than the central office fiber optic cable have more stringent consideration.
5, power lines, the communications cableThe fiber is a dielectric fiber optic cable can also be made to all media, no metals. This all-dielectric fiber optic cable will be the power system the best lines of communication. For all dielectric fiber optic cable laid by the power poles Road, there are two structures: All Dielectric Self Supporting (ADSS) structure and for the overhead ground wire of the winding structure. ADSS fiber optic cable because you can separate deployment, wide, has been widely used in the current transformation of China's electric power transmission system. The recent demand of the ADSS fiber optic cable in the country, is a popular products.
