Abstract
We examine 2.5Gbit/s and 5Gbit/s transmission characteristics of Nd-doped fiber amplifier (NDFA) at 1.064m as a booster amplifier and a pre-amplifier in the intersatellite optical communication links. It is found that the combination of the booster amplifier (100mW output) and the pre-amplifier (3dB noise figure) employing the NDFAs can establish giga-bit optical links between low-earth-orbit satellites with several thousands kilo-meters. Features of the NDFA such as high power conversion efficiency (52%) and low noise and high gain amplification characteristics, spatial-distortion-free beam output, polarization independence and vibration-free will allow it to replace the solid-state laser amplifier in free-space applications.
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