This part of IEC 60793 is applicable to optical fibre types A1 a, A1 b, and A1 d. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables.
Type A1 a applies to 50/1 25 µm graded index fibre. Three bandwidth grades are defined as A1 a.1 , A1 a.2 and A1 a.3. Each of these bandwidth grades is defined for two levels of macrobend loss performance that are distinguished by “a” or “b” suffix. Those with suffix “a” are specified to meet traditional macrobend loss performance levels. Those with suffix “b” are specified to meet enhanced macrobend loss (i.e. lower loss) performance levels.
