DWDM System Optionization Of Optical Transmission System

Cost saving, extended service life, improving the network operation quality, maximize the use of existing network, is the problem that each operator very concerned about, also this is the paper mainly study-optical network optimization. Along with the development of communication network, the business rates continue to upgrade, from the earliest2M-155M-622M-2.5G rate to the10G rate and40G rate, the optical network requirements are also continuously improved. A simple optical fiber transmission has been unable to meet the high speed business networking requirements, in SDH device, DWDM technology has become the mainstream. DWDM System on fiber parameters, OSNR parameters, amplifier parameter, index is very high. Often in the system, the configuration of parameters will be higher than the use of a threshold of3-4, for the follow-up network operation set aside margin (OSNR in20dB, amplifier gain in a nominal value, Dispersion module according to system standard, Cable attenuation adjustment in0.25dB/km). When the network is running after a period of time, because of the fault treatment for increasing the number of network adjustment, the network will be hidden different hidden trouble, lead system margin was exhausted, each performance parameter at the limit value of frequency, influence the normal operation of business, this is the problems that each system will face.This paper mainly studies the operation10years of DWDM System, wich uses G.652single-mode fiber, Huawei320G (32*2.5G) dense wavelength division equipment. In the present network of optical fiber, equipment performance parameters in aging, there are a large number of error in the channel, and affecting the upper bearing business situation. So I research system, optical fiber amplifier, OSNR and other parameters of degradation, and research the network operation mode is reasonable, than find out the problems, targeted development program.After programming, and project adjustment, validation study of the feasibility and the rationality of scheme. Application process, due to the limitation of cyber source, as far as possible to the network performance is adjusted to the optimum value to standard value, the channel error has been eliminated, and the upper bearing business has not affected. After a period of operation was observed that the network running smoothly, research methods and reasonable, feasible scheme is verified.