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Al-Gailani S.A.,University of Technology Malaysia | Al-Gailani S.A.,Industrial Technical Institute Mualla | Mohammad A.B.,University of Technology Malaysia | Shaddad R.Q.,University of Technology Malaysia | And 3 more authors.
Photonic Network Communications | Year: 2015

Hybrid wavelength division multiplexing/multibeam free-space optics (FSO) is a promising technique to overcome atmospheric attenuation due to tropical rain and to fulfill the growing demand for increased communication bandwidth and scalability. In this study, a hybrid four channel 1.25-Gb/s WDM/multibeam FSO network having four wavelengths with standard downlink channel spacing of 0.8 nm (100 GHz) is proposed. The hybrid WDM/multibeam FSO technique improved the performance of an FSO link in terms of the received power, link distance, data rate, and scalability. The proposed technique provided access data to four end users, each at a data rate of 1.25 Gb/s along an FSO link distance of 1,100 m. © 2014, Springer Science+Business Media New York. Source


Al-Gailani S.A.,University of Technology Malaysia | Al-Gailani S.A.,Industrial Technical Institute Mualla | Mohammad A.B.,University of Technology Malaysia | Islam M.S.,University of Technology Malaysia | And 3 more authors.
Journal of Optics (India) | Year: 2016

Free Space Optics (FSO) or optical wireless systems provide high data rate solution for broadband communication applications. FSO links are highly weather-dependent because different weather conditions significantly affect the link availability. In order to determine the best operational limit of an FSO link with respect to temperature and humidity, the effect of temperature and humidity on FSO network is studied in this work. Two new equations are proposed to model the effect of temperature and humidity on an FSO link operating at 850 nm in tropical climate. The first equation is developed to model the relationship between the humidity and temperature for tropical regions, while the second equation models the FSO link attenuation in terms of tropical temperature. In conclusion, it is suggested that FSO links can be operated with a normal variation of temperature and humidity in a tropical country to achieve near carrier class availability. © 2015, The Optical Society of India. Source

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