Wireless Infrared (IR) communications system is meant to use free-space propagation of light waves as a transmission medium in near infrared band. In this paper, voice communication system is simulated and implemented by protues software using IR as a source that is established an audio communication (link to transmit and receive voices and music via infrared light). The outcome of this proposed work is to design and implementation an optical wireless system to transmit voice over a certain distance in laboratory. This system has many advantages such as is a common, inexpensive, and the transmitter or receiver can be showed to another location with least distraction
This work was devoted for production of alumina (Al 2 O 3) nanoparticles via PLAL technique from a solid alumina target immersed in different solutions Distilled Water (D.W) as well as in ethanol in order to study the effect of these different solutions on the optical properties and structure of Al 2 O 3 nanoparticles. The controllability of particle size and size distribution is shown in this paper to be dependent upon the type of media and it proved that the peak absorption spectrum of samples produced in ethanol is lower than that produced in water. Thus it implies that the ablation efficiency in ethanol is lower, but in the same time it ensures that its oxides are not formed in ethanol due to prohibition of ethanol surrounding media form oxidation. The produced NPs were characterized via many tests such as UV-visible (UV-Vis.) and Atomic Force Microscope (AFM).
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