What term describes the optical fibers designed for use with LED light sources such as OM1 and OM2?

The term used to describe optical fibers designed for use with LED light sources, such as OM1 and OM2, is "legacy multimode." These fibers have a larger core size, typically 62.5 micrometers in diameter for OM1, which allows for higher attenuation and modal dispersion compared to newer fiber types. Legacy multimode fibers are optimized for use with LED sources that operate at longer wavelengths, typically around 850 nm.

These fibers were widely used in earlier networking technologies but have been largely supplanted by more advanced fiber types designed for higher performance and better efficiency, such as laser-optimized multimode fibers. However, the term "legacy multimode" specifically refers to the older standard of multimode fibers that align with LED applications, which distinguishes them from newer technologies aimed at higher bandwidth and optical performance. Options referring to specific specifications like G.652 or G.655 designate different types of single-mode fibers, which do not match the context of the question regarding LED compatibility.