EDFA can be used to amplify signal in two bands of wavelengths in the third transmission window. So, more and more researchers are exploiting use of EDFAs in WDM systems in order to improve their performance. For long distance communication, EDFAs with high pumping power and larger link length are available these days. The advent of EDFA has enabled the optical signals in an optical fiber to be amplified directly in high bit rate systems even beyond Terabits. This is more than enough to amplify data channels with the highest data rates without introducing any effects of gain reduction. It could be pumped effectively at wavelengths of 980nm or 1480nm and displays gain in the 1550 nm region.Įrbium Doped Fibre Amplifier: A particular attraction of EDFAs is its large gain bandwidth, which is typically tens of nanometers. Here the doping of silica core is done with Er3+. Their operation is the same as that of a lasing device. Optical amplifiers are devices which can amplify the optical signal directly without electrical to optical and optical to electrical conversion. For efficient utilization of bandwidth, dense wavelength division multiplexing is a technique which allows parallel transmission of various optical channels at different frequencies on a single fiber. But currently, various optical fibers are available with low losses (0.2 dB∕km) which can be efficiently utilized in various multiterabit and bandwidth efficient applications. In the early days, optical fiber could not be used for commercial applications because it had a very high attenuation of up to 1000 dB∕km. The optical fiber is the only medium that offers such a huge bandwidth by means of a better performance. The most recent information indicates that multimedia and high-capacity wavelength division multiplexed (WDM) networks need high bandwidths.
Fbg experiment using optisystem windows#
For communication, there are two windows 1530-1560nm(C-band) and 1560-1610nm (L-band). EDFA is an amplifier that is best used because of its low loss and high gain. The design parameters such as: erbium ions concentration, EDF length, isolators, wavelength division multiplexing (WDM) position, pump power position,circulators, pump directions, all of these elements and factors are affecting directly the amplifier output. Gain, noise figure, wavelength, power flatness and power output are directly affected by any element or parameter inside the amplifier configuration. Fiber amplifiers are crucial and fastgrowing field in the communication system The studyof the this field show that the formulation procedures of lasers generation and amplifier amplification displays aproblematical process due to the factors affecting and changing amplifier and laser significances in a dynamic way.
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