Bell, Tyndall and Röntgen all knew that gases and vapours absorb infra-red rays and that they would produce sounds if a stream of rays was interrupted at sonic frequencies. The mechanism of this ...

All-optical wavelength conversion and signal regeneration based on cross-absorption modulation in an InGaAsP quantum well electroabsorption modulator (EAM) is studied at different bit rates. We ...

Accurate sensing of objects in the marine environment under varying environmental conditions can be performed using a variety of sensing modalities; acoustic methods (sonar) dominate due to the ...