Fluke DTX-1800 Cable Analyser 900 MHz CAT 7

Optical Fibre Application Notes

Singlemode - (or SM fiber or fibre)
Typically has a core size of 9 µm and can be found in applications such as, broadband, telecommunications, FTTx, and general data comms. Depending on your testing requirements, we have Light Sources & Power meters which will report on attenuation (or loss) across the fibre. SM usually has a yellow protective jacket

Multimode - (or MM fiber or fibre)
MM fiber can have a core diameter of 62.5 µm or 50 µm.

Mostly used for communication over shorter distances, such as within a building or on a campus. Typical multimode links have data rates of 10 Mbit/s to 10 Gbit/s over link lengths of up to 600 meters, more than sufficient for the majority of premises applications.

We are seeing more and more 50 µm fibre called OM3 fibre being installed for high speed gigabit networks, this fibre has been optimised for use with lasers to achieve these speeds.

OM3 (50 µm) usually has an aqua colour protective jacket and 62.5 µm usually orange or grey jacket.

Additional
Clean connections are vitally important in a fibre network.