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. The equipment used for numerical aperture of optical fiber pdf over multi-mode optical fiber is less expensive than that for single-mode optical fiber. Because of its high capacity and reliability, multi-mode optical fiber generally is used for backbone applications in buildings. An increasing number of users are taking the benefits of fiber closer to the user by running fiber to the desktop or to the zone.
The LED light sources sometimes used with multi-mode fiber produce a range of wavelengths and these each propagate at different speeds. This chromatic dispersion is another limit to the useful length for multi-mode fiber optic cable. Single-mode fibers are often used in high-precision scientific research because restricting the light to only one propagation mode allows it to be focused to an intense, diffraction-limited spot. Jacket color is sometimes used to distinguish multi-mode cables from single-mode ones. The standard TIA-598C recommends, for non-military applications, the use of a yellow jacket for single-mode fiber, and orange or aqua for multi-mode fiber, depending on type. Multi-mode fibers are described by their core and cladding diameters.
125 µm multi-mode fiber has a core size of 62. In addition, multi-mode fibers are described using a system of classification determined by the ISO 11801 standard — OM1, OM2, and OM3 — which is based on the modal bandwidth of the multi-mode fiber. OM3 has occurred as users upgrade to higher speed networks. Cables can sometimes be distinguished by jacket color: for 62.
125 µm “laser optimized” OM3 and OM4 fiber. Modal dispersion is caused by the different speeds of the individual modes in a light pulse. The net effect causes the light pulse to spread over distance, introducing intersymbol interference. The greater the length, the greater the modal dispersion. Who is Erika Violet and what is she doing in my data center?
Cisco Mode-Conditioning Patch Cord Installation Note”. Cisco 10GBASE X2 Modules Data Sheet”. A mode-conditioning patch cord should never be used for applications over OM3 and more recent fiber types”. TIA Updates Data Center Cabling Standard to Keep Pace with Rapid Technology Advancements”.