Lexicon - F

FDDI (fiber distributed data interface)
An ANSI standard to ensure compatibility of components from different manufacturers.

Ferrule 
A precision tube, which houses a fiber. It aligns the fiber for interconnection or termination. A ferrule may be part of a connector or mechanical splice.

Fiber optics 
Light transmission through flexible transmissive fiber for communications or lighting.

Fiber ribbon 
Parallel fibers encased by one coating.

FO 
common abbreviation for "fiber optic" 

FTTD (fiber to the desk)
Distributing FO cables to the desk (workstation).

Fusion splicer
An instrument that splices fibers by fusing or welding them, typically by electrical arc.