Enhancing of multiwavelength free space optical communication system via optimizing the transceiver design parameters
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Enhancing of multiwavelength free space optical communication system via optimizing the transceiver design parameters Mohammed Ali Yaseen1 · A. K. Abass2 · Sinan M. Abdulsatar1 Received: 8 March 2020 / Accepted: 31 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this paper, the performance of multiwavelength free space optical (MFSO) communication system is enhanced via optimization of the transceiver design parameters. The performance of the proposed system is investigated and compared with the previous work under the same weather condition, as well as with and without misalignment losses (ML). The optimum transceiver design parameters of the proposed system are 15 cm, 20 cm and 1 mrad for transmitter, receiver diameter and beam divergence, respectively. According to the results, the maximum achievable distance at the communication conditions (6 for Q-factor and 1e−9 for BER) is about 5.1 km and 22 km for the system with and without ML, respectively within very clear weather condition. While, for hazy weather, these distances are reduced to 4.1 km for the system with ML and 8 km without ML. Furthermore, it’s represents an enhancement about 7.3% for the system with ML and 363.15% for the system without ML as compared with previous work. Keywords Multiwavelength free space optical · Misalignment losses · Optimization design parameters
1 Introduction The FSO communication systems have been suggested in numerous published works through recent decades and up to the present. This can be attributed due to two reasons; when it comes to the wireless communication it’s considered as an alternative or complementary system to radio frequency communication system (Erdogan et al. 2020), and when it comes to the optical communication it’s considered as complementary or emergency system to the fiber optic communication systems (Yu et al. 2015; Alnajjar et al. 2019).
* A. K. Abass [email protected] 1
Electrical Engineering Department, University of Technology, Baghdad, Iraq
2
Laser Engineering Branch, Laser and Optoelectronics Department, University of Technology, Baghdad, Iraq
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Furthermore, the FSO system was investigated under two different approaches, namely, single wavelength system (Savojbolaghchi et al. 2019) and wavelength division multiplexing (WDM) system (Hsu et al. 2013; Rashidi et al. 2017; Esmail et al. 2017) and most published articles for FSO based WDM system were theoretically works, especially via OptiSystem software (Fadhil 2013; Sahu and Prajapti 2015; Biswas et al. 2017; Singh 2018). This due to, the high cost of the equipment as well as difficulty dealing with WDM problems based wireless system in terms of; transmitting amplification and receiving. In this context, Vigneshwaran et al. (2013), proposed a single FSO channel via simulation and investigated the BER and the receiving power along a distance of 1 km between the transmitter and receiver. The FSO based WDM was suggeste
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