Abstract
The microwave region of the electromagnetic spectrum – frequencies between about 1 GHz and a few tens of GHz, or wavelengths in the centimetre range – is mainly used for radars, satellite links, short-haul terrestrial communications and electronic warfare equipment. And although optoelectronic components have been developed primarily for telecommunication needs, optical fibre technology is also attractive for microwave signal transmission and processing and could replace existing microwave carriers such as coaxial cable. Among the many advantages of fibres are huge bandwidth (more than several hundreds of GHzkm in single-mode fibre), low optical attenuation (less than 0.5 dBkm-1 at 1.3 μm and 0.2 dBkm-1 at 1.55 μm), low weight, small size and immunity to electromagnetic interference (EMI).
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