Connectors are designed specifically for either singlemode 9/125µm fibre or multimode 62.5/125µm or 50/125µm fibres. They are usually available in two versions, 900µm (pigtails) and 2 or 3mm cables (patchcords).

The optical fibre connector is precision made and manufactured to demanding specifications. It is designed to support the fibre and ensure that when inserted within an adapter the fibre is accurately aligned with its mating connector. With singlemode fibre the alignment of the two fibres is critical to ensure low light loss between the mating fibres.