Modern single mode and multimode fiber cabling features different optical core sizes (9μm and 50μm, respectively) and won’t natively splice or couple together. It is possible to connect the two different cable types; however, a media converter must be used to adapt the core sizes and optical wavelengths.
In most cases, media converters are used to integrate electrical-based electronics (such as twisted pair) with fiber optic cable; however, specialized models feature dual fiber optic (SFP) ports specifically designed to bridge optical infrastructures.
Application Design Notes:
Media converters typically require SFP transceiver modules to complete the fiber optic connection. These modules are specific to the type of fiber being connected (either single mode or multimode). Choose an SFP module based on the fiber optic cabling that will be connected to the network switches and ensure it is connected to the proper type of fiber.
SFP transceiver modules almost always require two fiber optic cable strands. Always integrate duplex (two strand) fiber optic cabling or higher strand counts.
Most modern SFP transceiver modules feature duplex LC connections. Terminate your fiber optic cabling with two LC-style connectors or purchase a pre-terminated fiber optic cable with two LC-style connectors.
When connecting terminated duplex fiber optic cable between media converters and/or network equipment, ensure the connections are reversed between the SFP transceiver ports (connection A to B and B to A). SFP transceiver modules rely on the transmission of separate send and receive signals.
Select an SFP module that matches the bandwidth of your media converter. 1G modules are technically classified as SFP transceivers, 10G modules are classified as SFP+ transceivers, and QSFP transceivers support even higher bandwidths.