单项选择题
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).
点击查看答案
相关考题
-
单项选择题
What is an advantage of an externally modulated laser over a directly modulated laser?（）
A. lower cost
B. higher chirp
C. easier to manufacture
D. higher dispersion tolerance
E. higher optical signal-to-noise ratio -
单项选择题
What is the difference between the transmitted power and the sensitivity of the receiver?（）
A. OSNR
B. dispersion
C. attenuation
D. power budget
E. amplifier spacing
F. four wave mixing -
多项选择题
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems? （）(Choose three.)
A. PIN photodiodes
B. zero-chirped lasers
C. Erbium-doped fiber amplifiers
D. dispersion compensating fiber
E. dispersion compensating Bragg grating
