多选题Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）APIN photodiodesBzero-chirped lasersCErbium-doped fiber amplifiersDdispersion compensating fiberEdispersion compensating Bragg grating
多选题
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）
A
PIN photodiodes
B
zero-chirped lasers
C
Erbium-doped fiber amplifiers
D
dispersion compensating fiber
E
dispersion compensating Bragg grating
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