论文部分内容阅读
过去 ,局域网 (L AN)一直采用铜电缆 ,但随着数据速率的不断提高 ,需要其他传输媒体 ,如光纤等来提供足够的带宽 ,同时还不会造成过量的信号损失。多模光纤的芯直径要比其载送的光的波长大一些。多模光纤的芯直径一般在 5 0~ 1 0 0 0 μm,而光 -信号波长在 1 .0~ 1 .6μm。老
In the past, local area networks (L ANs) have been using copper cables, but as data rates continue to increase, other transmission media, such as optical fiber, are needed to provide sufficient bandwidth without causing excessive signal loss. Multimode fiber core diameter than the light carried by its larger wavelength. Multimode fiber core diameter is generally 5 0 ~ 1 0 0 0 μm, and optical - signal wavelength at 1.0 ~ 1 .6 μ m. old