若PIN 的材料的禁带宽度为0.8eV, 则入射光的波长需要小于等于( )nm。A、1550B、1310C、850D、1600 - 查题网

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若PIN 的材料的禁带宽度为0.8eV, 则入射光的波长需要小于等于( )nm。
A、1550
B、1310
C、850
D、1600

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光纤通信

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