Wavelength, as a fundamental parameter in optical fiber communication, directly affects the transmission efficiency and signal quality of optical signals in optical fibers. So, what is optical fiber, and how does wavelength affect its performance? This article will provide the answers. This phenomenon can cause signals to overlap and degrade, impacting communication systems by. Given the critical role of fiber optic networks in contemporary communication, assessing their performance is essential. The paper details OFC system components such as light sources, fibers, connectors, amplifiers, and detectors.