BS EN 188201:1996 - Harmonized system of quality assessment for electronic components. Family specification: A1a graded index multimode optical fibres
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The optical parameters graded index LLM) multimode fibres (attenuation, modal bandwidth and numeri-
cal aperture) are given in Table III. Ranges of possible attenuation and bandwidth values are suggested at both 850 nm and 1300 nm. The actual values at both wavelengths (or just at one of these wavelengths) are to be agreed between user and manufacturer.
Note: Multimode fibres can in general be optimized in bandwidth either for 850 nm or 1300 nm or between these
wavelengths, depending on the refractive index profile parameter, g (see clause 1.4.1 in EN 188000), see figure 1. Due to this optimization it is practically impossible to produce fibres at extreme high bandwidths at both 850 nm
and 1300 nm, like 800 MHz.km at 850 nm and also 1500 MHz.km at 1300 nm.
