The Research Of GPON ONU In 1.25/2.5G Optical Transmission-Receiving Module

As the development of network bandwidth widening research, GPON system, which is the most practical and efficient method of FTTH, takes an outstanding status in communication R&D nowadays. GPON ONU optical transceiver, which is the core sub-module in GPON system, is a very difficult project for engineer all over the world, especially when the main rate of the module is 1.25 / 2.5G. There is a contradiction between the great need of market and the limit ability of module producers who can not make a module with fine, steady quality. Because ONU sub-module is the key module for photoelectric conversion in GPON system, and will decide the quality parameters the clients really get, such as rate of speed, type of service, the utilization ratio of network width, so the research of GPON ONU 1.25 / 2.5G optical transceiver has a very important meaning.The main ideas of the article include the following points:(1) In a variety of technologies to access more comprehensive, clear access to FTTH technology is the future direction of development, while in contrast the various FTTH technical basis, clear development GPON system in a practical sense.(2) Based on the R&D experience of EPON modules, we analyze the particularity of GPON OUN sub-modules and give out a fine schedule.(3) Detailed design modules in the programme to ensure that, by the assembly and testing of the actual vote panels, the certification of modular development programmes feasibility; New programme to streamline(4) Adoption of the two modules internal temperature compensation package contrast, a 8051 Chanpianji can clearly better driving APD boost circuit not only improve voltage regulation accuracy, and to meet the real-time debugging module requirements great savings debugging time.(5) Develop the module works in full temperature range(-40~+85℃) in order to meet the need of clients.The adoption of a comprehensive programme designed to ensure that the optical modules successful development, and in the development of modules to absorb a case basis, with GPON system itself features of ONU module development...