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Experimental optical transmission of electrical signals in the frequency range of 0.9-2.3 GHz and its distribution by using a radiating cable

Abstract:

The experimental transmission of electrical signals in the frequency range of 0.9-2.3 GHz through an optical link using an optical external modulation scheme at 1500 nm is successfully demonstrated. In the proposed experimental set up, a microwave generator provided the electrical signals to modulate an optical signal delivered by an optical source. After that the optical signal travelled 25.24 km is converted to an electrical signal by a photo detector, and distributed using a radiating cable inside a building. Finally, an antenna recovered the electrical signals spaced at 0.2 GHz in order to measure the quality of the transmitted signals. Measurements are carried out inside the optical communications laboratory room and the values of Signal-to-Noise-Ratio were around 39 dB. Experimental results suggest that the electrical signals can be used as electrical carriers in order to transmit analogue or digital data.