Attenuation in fiber optics refers to the reduction in light signal strength as it travels through a fiber cable, directly affecting the maximum transmission distance and network performance . It is measured in dB/km, with typical single-mode fibers at 1550 nm exhibiting around 0.22 dB/km under normal conditions . Attenuation limits how far a signal can travel before it becomes too weak to be reliably detected.
Attenuation arises from both intrinsic and extrinsic factors: Intrinsic Losses (within the fiber itself):
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