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
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相关考题
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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 -
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
