题目内容

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

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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

1、稳压二极管的正常工作状态为( )。?xml:namespace>

A、导通
B、截止
C、反向击穿
D、死区

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