OM3 single mode cable

[Jonn cos]

Hi all,

i thought that OM3 is a multimode standard, recently a cable guy told me that they have laid OM3 single mode, i asked him that OM3 is a multimode standard but he said no, single mode also comes in OM3 as well,

is that true ? ?

[Leo Laohoo]

Single mode and multi-mode comes in OM1, OM2, OM3, OM4, etc ... Your cable guy, unfortunately, is telling the truth.

[swapnendum]

OM is always multi-mode. The acronym itself stands for "Optical Multi-mode"

OS is single mode (e.g. OS1 and OS2).

IS there any reference you can share which says OM comes in Single Mode ? I have never heard or seen a OM Single mode fiber optics.