PON technology development history

The Passive Optical Network – PON mainly uses a passive optical power divider (coupler) for forwarding information to the respective users. As a result of the optical power splitter, so that the power reduction, and therefore more suitable for use for short-distance. PON (passive optical network) refers to ODN (optical wiring network) does not contain any electronic devices and electronic power, ODN all composed by the optical splitterand other passive components, active electronic devices without precious. A passive optical network includes a mounted on the optical line terminal (OLT) of the central control station, as well as a number of supporting the optical network units (ONUs) installed in the customer premises. The optical distribution network (ODN) between the OLT and the ONU includes optical fiber and passive optical splitters or couplers. PON technology development APON (ATM PON) 1995 FSAN (Full Service Access Network) alliance in 1996 by 13 major network operators and their equipment suppliers, 155Mb / s PON system technical specifications, ATM transport protocol, ITU-T G.983 series of standards BPON (Broadband PON) 2001, APON standard was later strengthened to support 622Mb / s transfer rate, coupled with dynamic bandwidth allocation, protection and other functions, to provide Ethernet access, video transmission, high-speed leased line business broadband PON GPON (Gigabit PON) The FSAN Union rate over 1Gb / s PON standard research, would like to propose a program can run in a higher rate, but also in terms of multi-service, OAM & P, and scalability compared to other PON efficiency high. This study makes Gigabit PON (GPON) appears. In January 2003, ITU-T approved established GPON standard G.984.1, G.984.2 and G.984.3 EPON (Ethernet PON) A new type of fiber-optic access network technology, it uses point-to-multipoint structure, passive optical fiber transmission, offers a variety of services on top of Ethernet. PON technology is used in the physical layer, the topology used in the link layer Ethernet protocol, the use of the PON realized Ethernet access. Therefore, it combines the advantages of PON and Ethernet technology: low cost; high bandwidth; scalable, flexible and rapid service reorganization; compatibility with existing Ethernet; convenient management. Buy fiber optic supplies from GPON and EPON maufacturer, we also supply  CWDM module, DWDM module for GPON and EPON system.