题目内容

Single-modefiberscanbedividedinto().单模光纤可以分为（）。

A. NDSF非色散位移单模光纤
B. DSF色散位移单模光纤
C. Plasticcoreopticalfiber塑芯光纤
D. NZDSF非零色散位移单模光纤

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The non-zero dispersion shifted single-mode fiber, also known as () fiber, is a new type of fiber designed and manufactured to adapt to the WDM transmission system.

A. G.652
B. G.653
C. G.654
D. G.655

阶跃光纤中的传输模式是靠光射线在纤芯和包层的界面上（）而使能量集中在芯子之中传输。

A. Half reflection
B. total reflection
C. Total refraction
D. transmission

At present, most of the optical fibers used in long-distance trunk transmission communication systems are single-mode fibers.目前长距离干线传输通信系统使用的光纤多为单模光纤。

A. 对
B. 错

单模光纤通信的工作波长是在长波长波段，即波长为1310或1550nm。

A. 对
B. 错