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What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)
- A、low optical power
- B、high optical power
- C、few optical channels
- D、many optical channels
- E、low chromatic dispersion
- F、high chromatic dispersion
- G、too much power differential in the optical channels
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单选题Which device creates an OEO conversion？ （）A
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单选题Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications？（）A
They are both regions of lowest loss.B
They are both regions of low reflections.C
They are both regions of low index of refraction.D
They are both regions of low chromatic dispersion.E
They are both regions of low Polarization Mode Dispersion （PMD）.
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