Fiber Optic Wiki

Last Mile Technology

June 8, 2011

Last mile technology is any telecommunications technology that carries signals from the broad telecommunication backbone along the relatively short distance (hence, the "last mile") to and from the home or business. Or to put it another way: the infrastructure at the neighborhood level.

What is EDFA

June 8, 2011

Short for erbium doped fiber amplifier. EDFA is an optical repeater device that is used to boost the intensity of optical signals being carried through a fiber optic communications system. An optical fiber is doped with the rare earth element erbium so that the glass fiber can absorb light at one frequency and emit light at another frequency. An external semiconductor laser couples light into the fiber at infrared wavelengths of either 980 or 1480 nanometers. This action excites the erbium atoms. Additional optical signals at wavelengths between 1530 and 1620 nanometers enter the fiber and stimulate the excited erbium atoms to emit photons at the same wavelength as the incoming signal. This action amplifies a weak optical signal to a higher power, effecting a boost in the signal strength.

How do fiber optic couplers work

June 8, 2011

:: The need for fiber optic couplers

Comparison with electrical transmission(2)

June 7, 2011

In short distance and relatively low bandwidth applications, electrical transmission is often preferred because of itsLower material cost, where large quantities are not requiredLower cost of transmitters and receiversCapability to carry electrical power as well as signals (in specially-designed cables)Ease of operating transducers in linear mode.

What is Fiber Media Converter?

June 7, 2011

Fiber media converters are simple networking devices that make it possible to connect two dissimilar media types such as twisted pair with fiber optic cabling. They were introduced to the industry nearly two decades ago, and are important in interconnecting fiber optic cabling-based systems with existing copper-based, structured cabling systems. They are also used in MAN access and data transport services to enterprise customers.

What is Optical Router?

June 7, 2011

The optical fiber technology is based on the principle of carrying the data at the speed of light. The optical routers use optical switching techniques in order to work. The optical routers are able to provide IP at a speed of light.

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