Abstract

By the use of optical Erbium Doped Fiber Amplifiers (EDFA) in space communications it is possible to exploit the large capacity offered by the optical link, with a considerable reduction of transmitted power. A novel optical system for stratospheric communications is proposed. The link from a stratospheric platform to another one is carried out within the optical domain, thanks to the presence of a GEO that ensure the optical amplification. The optical preamplifier on the receiver end, is the key point for the system design: it must ensure the proper gain to the signal without introducing limitative Spontaneous Emission Noise.

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