Optical Fiber Attenuation

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Questions and Answers

What is attenuation in optical fiber?

Enhancement of the optical signal strength during transmission
Increase in the intensity or power of an optical signal as it travels through the fiber
Complete absorption of the optical signal by the fiber material
Reduction in the intensity or power of an optical signal as it travels through the fiber (correct)

What is one of the factors contributing to attenuation in optical fiber?

Increase in signal intensity due to bending of the fiber
Scattering due to microscopic variations in the density of the fiber material (correct)
Complete reflection of light within the fiber core
Enhancement of signal strength due to absorption by the fiber material

How is attenuation typically measured?

Decibels per kilometer (correct)
Watts per kilometer
Watts per meter
Decibels per meter

What is dispersion in optical fiber?

<p>Spreading of a light pulse as it travels through the fiber, limiting data-carrying capacity and quality of the transmitted signal (C)</p> Signup and view all the answers

What causes chromatic dispersion in optical fibers?

<p>Different wavelengths of light traveling at different speeds through the fiber (D)</p> Signup and view all the answers

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Study Notes

Optical Fiber Fundamentals

Attenuation in Optical Fiber: A reduction in the intensity of light signal as it travels through the fiber, resulting in signal degradation and loss of data.
Contributing Factor to Attenuation: Absorption of light by impurities in the fiber, such as water molecules or metal ions, which absorb specific wavelengths of light, causing signal loss.
Measuring Attenuation: Typically measured in decibels per unit length (dB/km), attenuation is calculated by comparing the input power to the output power of the signal as it travels through the fiber.

Dispersion in Optical Fiber

Dispersion in Optical Fiber: A phenomenon where the signal spreads out over time, causing pulse broadening and decreased signal quality, resulting in data transmission errors.
Chromatic Dispersion: Caused by the different wavelengths of light traveling at different speeds through the fiber, resulting in signal dispersion and broadening.