Abstract
The aim of this article is a comparison of the EDFA (Erbium Doped Fibre Amplifier) and the DRA (Distributed Raman Amplifier) in a fully optical communication system, working on a specific wavelength. The amplifiers are compared based on their position in the optical loop and are evaluated according to the Q-factor and bit error rate (BER). In the case of the DRA, the accomplished distance was smaller, while changing the optical power in CW (Continuous Wave) to attain better BER. In the application of the EDFA a similar optical loop was created, as well, while the basic parameter for comparison was a bit speed. For the EDFA the bit speed was changed from 10 to 15 Gbps. For the DRA the change was in the power from 1 to 3 mW with the bit speed kept at 10 Gbps. This publication also focuses on the need for such application of a transfer system in a software environment. It would enable examination and research and consequently a minimising of the influence of non-linear effects impacting the particular WDM (Wavelength Division Multiplex) system.
Highlights
Our age cannot be called anything but the age of information and telecommunication technologies
The aim of this article was a comparison of two optical fibre amplifiers, namely the EDFA and the DRA
In the configuration with EDFA the distance was 2625 km at the bit speed of 10 Gbps, while bit error rate (BER) reached the value of 6.4325.10-11 (Fig. 6)
Summary
Our age cannot be called anything but the age of information and telecommunication technologies. The growing number of users who need to transfer a still greater amount of data though the current infrastructure leads to many problems which the current data networks find hard to manage [1 - 3]. One of these problems is the bandwidth. Until recently the most widespread type of medium for network transfer was metallic wiring. They reached their physical limits of capacity and bandwidth. One convenient faculty of optical fibre springs from the property of light It is a large bandwidth limited only by the frequency of the light mode. One cannot omit mentioning such non-linear effects as, for example: SPM (Self Phase Modulation), XPM (Cross Phase Modulation) and FWM (Four Wave Mixing), which significantly influence the signal transfer by the optical fibres [9]
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