The Difference between Single Mode Fiber and Multi mode Fiber
Posted on Aug 01, 2016 by cozlink.com
Definition: In fiber-optic communication, a single-mode optical fiber (SMF) is an optical fiber designed to carry light only directly down the fiber – the transverse mode. For single-mode optical fiber, no matter it operates at 100 Mbit/s or 1 Gbit/s date rates , the transmission distance can reach to at least 5 km. Typically, it is used for long-distance signal transmission. Multi-mode optical fiber (MMF) is a type of optical fiber mostly used for communication over short distances, such as within a building or on a campus. Typical transmission speed and distance limits are 100 Mbit/s for distances up to 2 km (100BASE-FX), 1 Gbit/s up to 1000m, and 10 Gbit/s up to 550 m. There are two kinds of multi-mode indexes: step index and graded index.Application:Single mode fiber is used for long distance communication and for carrying very high bandwidth signal. The major applications of single mode are CATV, Telcos, universities as well as colleges. Laser diode is used as opti..
DefinitionAn optical fiber (or optical fibre) is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables.ApplicationsOptical fiber is used by many telecommunications companies to transmit telephone signals, Internet communication, and cable television signals. Due to much lower attenuation and interference, optical fiber has large advantages over existing copper wire in long-distance and high-demand applications.Number of modes in optical fiberThe mode theory, along with the ray theory, is used to describe the propagation of light along an optical fiber. The mode theory uses electromagnetic wave behavior to describe the propagation of light along a fiber. The op..
DefinitionSingle-mode optical fiber (SMF) is an optical fiber designed to carry light only directly down the fiber - the transverse mode. Modes are the possible solutions of the Helmholtz equation for waves, which is obtained by combining Maxwell's equations and the boundary conditions. These modes define the way the wave travels through space, i.e. how the wave is distributed in space. Waves can have the same mode but have different frequencies. This is the case in single-mode fibres, where we can have waves with different frequencies, but of the same mode, which means that they are distributed in space in the same way, and that gives us a single ray of light.Since there is only one mode, there is no problem with modal dispersion and the choice of core material can reduce chromatic dispersion (see below) which increases the bandwidth to almost infinity - but it's practically limited to about 100,000 gigahertz - that's still a lot! Single mode fiber has a core diameter of 8-10 microns,..
Definition:An optical fiber (or optical fibre) is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair. Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in optical fiber communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables.Application:Optical fibers have a wide number of applications. They are used as light guides in medical and other applications where bright light needs to be shone on a target without a clear line-of-sight path. Optical fiber is also used in imaging optics. A coherent bundle of fibers is used, sometimes along with lenses, for a long, thin imaging device called an endoscope, which is used to view objects through a small hole. In spectroscopy, optical fiber bundles transmit light from a spectrometer to a substance that cannot be placed inside the spectromet..