Abstract
Currently it is not possible to create a fully optical communication system without a software tool which simulates an optical communication line in real conditions prior to its construction. The aim of this article is to establish a comparison between the EDFA (erbium doped fibre amplifier) and SOA (semiconductor optical amplifier) optical amplifiers in the WDM (wavelength division multiplexing) system. The system contains a four-channel WDM with speed of 10 Gbps and optical fibre with length of 80 km. Simulations are conducted in the programme environment “OptSim.” The quality of the optical communication system is evaluated by the BER (bit error rate) and Q-factor for individual wavelengths, namely, of 1558 nm and 1562 nm, which are within the C-band.
Highlights
With the increasing need for higher transfer speeds and greater quantity of transferred data, the optical cable lines are reaching their limits of transfer capacities
The EDFA parameter settings and the length of erbium doped fibre have been designed on the basis of [22]
The main aim of this article is the comparison of two optical amplifiers, the EDFA and the SOA in the DWDM system
Summary
With the increasing need for higher transfer speeds and greater quantity of transferred data, the optical cable lines are reaching their limits of transfer capacities. One of the options for more effective usage of optical lines is wavelength multiplexing. Using a transfer speed of 10 Gbps (STM-64) with the help of WDM, 128 spectral channels achieving a transfer speed of 1 Tbps could be created in one optical fibre [1, 2]. In optical communication the EDFA fibre amplifiers, SOA semiconductor amplifiers, or amplifiers based on the Raman effect are the most widely used ones [2,3,4]. The third chapter is devoted to the error rate BER and related Q-factor. The fourth chapter describes EDFA and SOA optical amplifiers and their basic principles. In the last chapter a simulation is created for the comparison of BER and Q-factor while evaluating the properties of the optical amplifiers
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