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).
更多“Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?（）”相关的问题
A、A. They are both regions of lowest loss. B、B. They are both regions of low reflections. C、C. They are both regions of low index of refraction. D、D. They are both regions of low chromatic dispersion. E、E. They are both regions of low Polarization Mode Dispersion （PMD）.
A、Because they are not engaged in the distress traffic B、they will affect the transmission of the distress traffic C、The powers of these stations are very weak D、They are not in charge of search and rescue
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