Impact on Window Efficiency Optical Fiber Length Changes in the Dispersion Under the Action of Negative Influences

the performance window of single-mode optical fibers in the VSP-SR system is Considered based on the results of its influence on the dispersion length with an increase in the number of channels, transmission speed, modulation methods, chromatic and polarization mode dispersions, nonlinear effects, changes in the power and signal-to-noise ratio. It is shown that if you do not take appropriate measures to protect against negative impacts, the transmission characteristics will change significantly and information loss may occur. These changes will affect the dispersion length.