由於單模光纖的中心玻璃芯很細，存在材料色散和波導色散，因此適用於遠程通訊，同時對光源的譜寬和穩定性亦有較高的要求。
多模光纜主要用於短距離的光纖通訊，典型的傳輸速度是100M/s，傳輸距離可達2km;1G/s可達1000m;10G/s可達550m。
由於多模光纜的傳輸模式可達數百個，且各個模式的傳播常數和群速率各不同，使得光纖的帶寬窄、色散大、損耗大，因此只適用於中短距離和小容量的光纖通信系統。
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The difference between single-mode optical cable and dual-mode optical cable.
The single-mode optical cable is .posed of optical fiber + outer sheath + intermediate medium, and is a transverse mode optical fiber that directly transmits optical signals. Single-mode fiber can .n at a data rate of 100M / s or 1G / s, and the transmission distance can reach more than 5 kilometers.
Because the center glass core of single-mode optical fiber is very thin, there are material dispersion and waveguide dispersion, so it is suitable for long-distance .munication, and also has higher requirements for the spectral width and stability of the light source.
Multimode optical cable is mainly used for short-distance optical fiber .munication. The typical transmission speed is 100M / s, the transmission distance can reach 2km; 1G / s can reach 1000m; 10G / s can reach 550m.
Since the transmission mode of multimode optical cable can reach hundreds, and the propagation constant and group rate of each mode are different, the bandwidth of the optical fiber is narrow, the dispersion is large, and the loss is large. system.
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