Hi,
As Current MMF standards, such as OM3 and OM4, use fibers with core radii of 50 µm, allowing hundreds of modes to propagate.
In addition, fibers with large radii can support higher
peak powers, relative to fibers with small radii, while still operating in the
linear regime. MMF has practical advantages over single-mode fiber (SMF)
such as increased alignment tolerances and ease of packaging,
which can lead to significant cost savings. The main drawback
of MMF is the multimode nature of the fiber that gives rise to
modal dispersion and limits its bandwidth to a fraction of what
can be achieved with SMF. Though it seems that little can be
done about the inherent modal dispersion associated with the
multimode nature of fibers, researchers have achieved improvements
in the bandwidth–distance product of MMF using several
approaches such as selective modal excitation.
Thanks,