Abstract
High bit rate data transmission using Free Space Optics (FSO) is an interesting application that could open an entire unregulated range of optical frequencies for earth-to-earth or earth-to-sky communications. The advent of this technology requires a new set of semiconductor devices operating in 8 µm to 12 µm wavelength range that can be implemented in already existing communication systems. Using unipolar quantum optoelectronic devices, we have demonstrated data transmission with bitrate in excess of 20 Gbit s−1 in the thermal atmospheric window at ~ 10 μm wavelength. All our devices operate at room temperature and have an intrinsic frequency bandwidth of several GHz.
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