网信彩票

62.5μm core diameter multimode fiber has larger core diameter and higher numerical aperture than 50μm core diameter 10G multimode fiber jumper, which can couple more optical power from LED light source. Therefore, 62.5/125μm multimode fiber was first adopted by the United States as Many industry standards. Such as AT&T's indoor wiring system standard, American Electronics Industry Association (EIA) LAN standard, American National Standards Institute (ANSI) 100Mb/s token network standard, IBM's computer optical fiber data communication standard, etc.

（萬兆多模光纖跳線應用場景）

Compared with 62.5/125μm, 50/125μm fiber has smaller numerical aperture and core diameter, and its bandwidth is higher than that of 62.5/125μm fiber, and the production cost can be reduced by 1/3. Therefore, industries in various countries have proposed to re-enable 50/125μm multimode fiber. After research and demonstration, the International Organization for Standardization has formulated corresponding standards. However, considering that a considerable number of 62.5/125μm multimode fibers have been installed and used in local area networks in the past, the IEEE802.3z Gigabit Ethernet standard stipulates that 50/125μm and 62.5/125μm 10 Gigabit multimode fiber jumpers can be used as 1GMbit. /s The transmission medium of Ethernet is used.

The first type is the InfiniCor300 type. According to the 62.5/125μm standard, it can transmit 300 meters at a wavelength of 850nm and 550 meters at a wavelength of 1300nm at a rate of 1Gb/s. The second is the InfiniCor600 type. According to the 50/125μm standard, at a rate of 1Gb/s, both 850nm and 1300nm wavelengths can transmit 600 meters.

Multimode fiber-the core is thicker (50 or 62.5μm), which can transmit multiple modes of light. However, the inter-mode dispersion is relatively large, which limits the frequency of the transmission of digital signals, and it becomes more serious with the increase of distance. Therefore, the transmission distance of multimode fiber is relatively short, generally only a few kilometers.

In terms of future development trends, the horizontal cabling network rate needs 1Gb/s bandwidth to the desktop, the building backbone network needs to be upgraded to 10Gb/s rate bandwidth, and the campus backbone network needs to be upgraded to 10Gb/s or 100Gb/s rate bandwidth. Network applications are growing at a rate of about 50% per year. It is estimated that Gigabit to the desktop will become as common as 100M to the desktop in the next 5 years. Therefore, the system planning must be forward-looking, and the level part should consider 6 types of cabling. , The backbone part should consider 10 Gigabit multi-mode optical cables, especially the cost of Category 6 copper cables plus 10 Gigabit multi-mode optical fiber jumpers and Category 5 copper cables plus Gigabit multi-mode optical cables is about less than 10-20%. From the perspective of long-term application, if the cost permits, the use of Category 6 copper cables and 10 Gigabit optical cables should be considered