Performance of Free-space Optical Communication Systems using Optical Amplifiers under Amplify-forward and Amplify-received Configurations

摘要

In concerning the growth of era digital technology that has on the stage of indutrial revolution 4.0, the demand for broadcasting the information in huge ammount is mandatory and reaching the user into the last mile as well. This urgent demand must be supported with reliable communications platform that meet those growth and development. Free-space optical (FSO) communications is one of the platform that has some potentials to be implemented to meet this demand. In this paper, Wavelength Division Multiplexing (WDM) on FSO that carrying data rate on 80 Gbps is investigated through simulation. The configuration of FSO is setup on the scheme of amplify-forward and amplify-received which each of one is using an optical amplifier. The investigation is seeking the best performance of optical signal amplification between EDFA and SOA under the atmospheric channel. From the simulation, we find that EDFA has better performance than SOA as the optical signal amplification for 8 channels of C-band in order to carry huge information and reaching the last mile user. The maximum of propagation path length under the FSO channel for scheme of amplify-forward and amplify received using EDFA is 1.7 Km where the performance of BER can be achieved at 10-6.