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Free space optical communication has merged the aspects of fiber optics andthe wireless communication which are the most conquered and controlledtelecommunication technologies. Most of the features of free space optics (FSO)are interrelated to fiber optics but the difference between them istransmission medium, which is glass in case of fiber-optics and air/vacuum incase of FSO. In the near future, communication between LEO & GEO satelliteswith each other which are orbiting the Earth will be done by usinginter-satellite optical wireless communication (IsOWC) systems. IsOWC systemsis the most significant application of the FSO and it will be installed in thespace in the near future because of its low input power, no licensing by ITU,low cost, light weight, small size of the telescopes and very high data ratesas compared to the radio frequency (RF) satellite systems. In this researcharticle, IsOWC system is designed between LEO and GEO satellites by usingoptisystem which is not stated in past examined research works. Inter-satellitelink is established between satellites which are separated by the distance of40,000 Km at the bit rate of 10 Gbps.

Modeling and Performance Analysis of 10 Gbps Inter-Satellite-Link (ISL)  In Inter-Satellite Optical-Wireless Communication (IsOWC) System between LEO  and GEO Satellites