Theoretical Study on Wavelength Division Multiplexing Optical Fiber Communication Systems

Abstract

With the rapid growth in network bandwidth demand, optical communication technology has developed at a breakneck pace. Wavelength division multiplexing (WDM) has become a key technology for improving fiber optic utilization and solving the problem of large-capacity data transmission. This paper systematically studies WDM technology, elucidating its classification, influencing factors, and application scenarios. It analyzes the constraints of wavelength stability, dispersion, and nonlinear effects on system performance. Based on this, it further enhances bandwidth capacity through hybrid multiplexing techniques combining WDM with polarization division multiplexing (PDM) and mode division multiplexing (MDM), achieving an exponential expansion of single-mode waveguide capacity. By comparing the capacity, advantages, and application scenarios of single-mode multiplexing with multi-dimensional hybrid multiplexing, it further clarifies that multidimensional hybrid multiplexing is the core technology and inevitable trend of future ultra-high-speed optical communication. This research clarifies the development path of optical communication multiplexing technology and provides theoretical reference for the research and application of next-generation ultra-high-speed, ultra-large-capacity optical communication systems.