In fiber optics, attenuation is quantified in which unit?

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Multiple Choice

In fiber optics, attenuation is quantified in which unit?

Explanation:
Attenuation in fiber optics describes how much the light signal weakens as it travels through the fiber. This loss is expressed as a ratio of input to output power on a logarithmic scale, which is why decibels are used. Using decibels (often written as dB, or dB/km for a per-length measure) lets you add losses from different fiber segments simply by summing the dB values, making it easy to compare and total up absorptive and scattering losses. Watts would be a raw power measurement, not a relative loss, so it doesn’t express attenuation. Lumens relate to perceived brightness, and ohms measure electrical resistance, neither of which capture optical signal loss.

Attenuation in fiber optics describes how much the light signal weakens as it travels through the fiber. This loss is expressed as a ratio of input to output power on a logarithmic scale, which is why decibels are used. Using decibels (often written as dB, or dB/km for a per-length measure) lets you add losses from different fiber segments simply by summing the dB values, making it easy to compare and total up absorptive and scattering losses. Watts would be a raw power measurement, not a relative loss, so it doesn’t express attenuation. Lumens relate to perceived brightness, and ohms measure electrical resistance, neither of which capture optical signal loss.

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