Multimode fiber attenuation over one kilometer

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This document describes how to calculate the maximum attenuation for an optical fiber. Single-mode fiber optic cables are more suitable for long-distance, high-speed transmission than multimode fiber optics. The attenuation coefficient is measured in decibels per kilometer (dB/km) and is determined by several factors, including the type of fiber used in the cable, the wavelength of the light, and the quality of the fiber and its connections. ANSI/TIA/EIA-455-204 ("Measurement of Bandwidth on Multimode Fiber") describes a Fiber Optic Test Procedure (FOTP) for measuring what is known as the "-3 dB bandwidth".

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