Effect of Fiber-Telescope Coupling Losses on Wideband Wavelength Division Multiplexing in Free Space Optical Communications
Engineering and Technology Journal,
2022, Volume 40, Issue 2, Pages 350-357
AbstractThe effect of telescope losses (TL) on wideband wavelength division multiplexing (Wideband-WDM) based on free-space optical communication (FSOC) is investigated via OptiSystem software. In this work, both single and dual channel FSOC systems are investigated under different communication weathers: clear, haze, rain, and fog with attenuation losses of 0.2 dB/km, 2.3 dB/km, 4.3 dB/km, and 8.0 dB/km, respectively. The TL measures the coupling efficiency between the fiber and telescope in the transceiver assembly; therefore, is considered an important design parameter for the FSOC and hybrid optical communication system. According to the results, the maximum TL is 23 dB and 29 dB for single and dual FSOC, respectively, at the clear weather condition and for 1 km communication distance. This means that the dual-channel system could afford higher losses than the single system by approximately 26.1 %. Furthermore, this ratio is approximately the same for the other weather conditions, 28.6 %, 31.6 %, and 40 % for the hazy, rain, and fog weather, respectively.
- The Effect of TL on the performance of WDM-FSO is investigated.
- Wide Band WDM-FSO (C+L) is simulated utilizing hybrid fiber amplifier.
- High bit rate of 320 Gbps is achieved via 32 channels unidirectional (32 x 10 Gbps).
 H. Kaushal, V. K. Jain, and S. Kar, Free Space Optical Communication. India: Springer, 2017.
 M. A. Yaseen, A. K. Abass, and S. M. Abdulsatar, Enhancing of multiwavelength free space optical communication system via optimizing the transceiver design parameters, Optical and Quantum Electronics, 52 (2020).
 M. A. Yaseen, A. K. Abass, and S. M. Abdulsatar, Improving of Wavelength Division Multiplexing Based on Free Space Optical Communication via Power Comparative System, Wirel. Pers. Commun., 2021.
 S. H. Alnajjar, M. H. Ali, and A. K. Abass, Enhancing Performance of Hybrid FSO/Fiber Optic Communication Link Utilizing Multi-Channel Configuration, J. Opt. Commun., (2019) 3–8.
 H. Savojbolaghchi, S. M. S. Sadough, M. T. Dabiri, and I. S. Ansari, Generalized channel estimation and data detection for MIMO multiplexing FSO parallel channels over limited space, Opt. Commun., 452 (158–168).
 H. Y. Hsu, W. C. Lu, H. Le Minh, Z. Ghassemlooy, Y. L. Yu, and S. K. Liaw, 2 × 80 Gbit/s DWDM bidirectional wavelength reuse optical wireless transmission, IEEE Photonics J., 5 (2013).
 F. Rashidi, J. He, and L. Chen, Spectrum slicing WDM for FSO communication systems under the heavy rain weather, Opt. Commun., 387 (2016) 296–302.
 M. A. Esmail, A. Ragheb, H. Fathallah, and M. S. Alouini, Investigation and Demonstration of High Speed Full-Optical Hybrid FSO/Fiber Communication System under Light Sand Storm Condition, IEEE Photonics J., 9 (2017).
 H. A. Fadhil et al., Optimization of free space optics parameters: An optimum solution for bad weather conditions, Optik (Stuttg)., 124 (2013) 3969–3973.
 N. Sahu and J. C. Prajapti, Optimization of WDM-FSO link using Multiple Beams under different rain conditions, Int. J. Adv. Res. Electron. Commun. Eng., 4 (2015) 1125–1131.
 S. K. Biswas, P. Biswas, J. Akhtar, and M. I. Reja, Estimation of Link Range and Bit Rate for 16 Channel WDM-FSO Considering Atmospheric Turbulence and Pointing Error Under Various Weather Conditions, in International Conference on Electrical, Computer and Communication Engineering (ECCE), (2017) 838–843.
 M. Singh, Performance analysis of WDM-FSO system under adverse weather conditions, Photonic Netw. Commun., 36 (2018).
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