Multi-Mode Fiber

Multi-mode fiber is designed for high-bandwidth connections over long distances. It is commonly available in both 62.5/125µ and 50/125µ types, with the 50µ fiber supporting longer cable runs. Multi-mode transmitters generally use an LED or VCSEL laser as the optical source. It can use a variety of connectors, including SC, ST, LC, and MTRJ types.
Fiber offers immunity from Electromagnetic Interference (EMI) and Radio-Frequency Interference (RFI), but does not support power connections. Most fiber devices have an optical transmitter (LED or laser) at one end and a photo-detector at the other, so they only support communications in one direction, although some contain bi-directional optical transceivers.
Single-mode fiber supports even longer cables, but is generally more expensive, as it requires a more precise optical source (see Single-Mode Fiber).

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