# A power of 1.25 mW is launched into an optical fiber that has a 0.4 dB/km attenuation. Determine the fiber length such that a power of 1 W is received at the other end of the fiber.

Chapter 12, Problems #60

A power of 1.25 mW is launched into an optical fiber that has a 0.4 dB/km attenuation. Determine the fiber length such that a power of 1 μW is received at the other end of the fiber.

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