Multimode Fiber Specifications

Some types are single mode and some types are multimode.

Multimode fiber specifications.

Usually we see single mode and multimode fiber types available on the market. The cisco 10gbase lrm module supports link lengths of 220m on standard fiber distributed data interface fddi grade multimode fiber mmf. This means that the core to cladding diameter ratio is 50 microns to 125 microns and 62 5 microns to 125 microns. Om1 om2 om3 and om4.

At present there are four commonly used om multimode fibers. Multimode fibers are described by their core and cladding diameters. Multimode fibers are identified by the om optical mode designation and their specifications are outlined by the iso iec 11801 standard. At present there are four kinds of multi mode fibers.

Multi mode optical fiber is a type of optical fiber mostly used for communication over short distances such as within a building or on a campus. Multi mode links can be used for data rates up to 100 gbit s. Optical specifications dimensional specifications glass geometry coating geometry core diameter 50 0 2 5 μm cladding diameter 125 0. The letters om stand for optical multimode.

Each has a common cladding diameter 125 microns but different core diameters 50 microns and 62 5 microns. Several standards address both sizes to varying degrees of depth. Multimode fibers are described by their core and cladding diameters. Rf broadband signals such as what cable companies commonly use cannot be transmitted over multimode fiber.

An all inclusive list of the various optical fiber specification sheets. To make sure that specifications are met over fddi grade om1 and om2 fibers the transmitter should be coupled through a mode conditioning patch cord. Fiber specifications the usual fiber specifications are size core cladding diameter in microns attenuation coefficient db km at appropriate wavelengths and bandwidth mhz km for multimode fiber and chromatic and polarization mode dispersion for singlemode fiber. Usually the diameter of the multimode fiber is either 50 125 µm or 62 5 125 µm.

Two popular sizes of multimode fiber exist today for use in commercial applications. Multi mode fiber has a fairly large core diameter that enables multiple light modes to be propagated and limits the maximum length of a transmission link because of modal dispersion. Multimode fibers om1 om2 om3 om4 and om5. This section will review the more technical naming conventions and specifications for both multimode and single mode fiber.

Multimode fiber is usually 50 125 and 62 5 125 in construction. 50 micron and 62 5 micron.