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

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第1题

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第2题

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第3题

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第4题

[多选题] Which three applications are disabled for compression by default?（） (Choose three.)

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