Abstract
Free Space Optics is a line of sight communication which transmits a very narrow beam width. FSO offers high bandwidth and higher data rate up to 10 Gbps. FSO units are transportable, compact and are easy to redeploy. With so many advantages of FSO there exists serious limitations of atmospheric effects which makes it inefficient for long reach transmission. Environment factors act as barriers in efficient utilization of FSO technology. A major issue in FSO links is the turbulence induced fading which severely deteriorates the link performance, hence need to be alleviated for the efficient use of this rapidly emerging technology. Various researches have been carried out in FSO field to minimize the effect of turbulence induced scintillation. One such technique has been employed in this paper in which coherent based homodyne detection is utilized in conjunction with multibeam technique in WDM-FSO system with aim to reduce the scintillation effect. The performance comparison of the homodyne detection and direct detection in terms of bit error rate, Q- factor, and eye diagram has been explored for the scintillating effect.
Highlights
The growing interest to seek for high speed and pervasive broadband remote access has prodded massive development in internet traffic demand
Various researches have been carried out in FSO field to minimize the effect of turbulence induced scintillation. One such technique has been employed in this paper in which coherent based homodyne detection is utilized in conjunction with multibeam technique in Wavelength division multiplexing (WDM)-FSO system with aim to reduce the scintillation effect
First section bears out the performance of SB WDM-FSO system and MB WDM-FSO system using Homodyne detection under the scintillation effect, followed by the section demonstrating the comparative analysis of both systems along with the comparative analysis of preexisting Multibeam WDM-FSO system using direct detection with the proposed Multibeam WDM-FSO system using Homodyne detection and the last section optimizes the input power of the proposed system
Summary
The growing interest to seek for high speed and pervasive broadband remote access has prodded massive development in internet traffic demand. Supplementing the current RF solutions, FSO has proven to be a moderate and appealing high information rate innovation and is ready to turn into a promising contender to determine the current “last mile” network problem. It is for the most part because of the immensely attractive highlights of FSO innovation like low power utilization, diminished interference, high adaptability and re-configurability and a high level of security [1]. One of the encumbrance is atmospheric scintillation, which can be the source of intensity blurring in FSO systems creating this invention badly arranged for applications demanding high accessibility. Some of the techniques to raise the efficiency of FSO communication have been reviewed
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