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
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相关考题
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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 -
单项选择题
What is the phenomenon called where different wavelengths of light travel at different speeds?（）
A.OSNR
B.dispersion
C.light skew
D.attenuation -
单项选择题
A 2.5 Gb/s (OC-48 or STM-16) optical signal with a dispersion tolerance of 1200 ps/nm goes through fiber with 18ps/nm*km of dispersion. How many 15216-DCU-350 equivalents are needed for enough compensation after traveling 100 km?（）
A.none
B.one
C.two
D.three
E.four
