The paper presents the main objective of the idea of a photonic radar and an example of the engineering of the first fixed photonic radar demonstrator, designed for use in air traffic control. Some issues related to the production and transmission of microwave and optical signals, as well as the frequency conversion of these signals have also been presented.
Conducting research on the state of superposition and the phenomenon of tunnelling has resulted in the discovery of quantum entanglement and quantum teleportation. They have laid the foundation for quantum cryptography and the construction of devices for remote sensing surveillance. The article presents selected aspects and references to some phenomena formulating the basis of quantum remote sensing. The potential benefits of quantum entanglement and quantum entangled photon beam illumination in this field have also been mentioned.
One of the first applications of the photoacoustic effect included the wireless voice communication over long distances. Nowadays, the photoacoustic methods have laid the foundation for the operation of measuring instruments, used e.g. for contactless specification of the composition and spatial distribution of substances. Photoacoustic methods are also used in the ultra-sensitive spectroscopic examination of trace gases, e.g. for the detection of toxic substances, explosives, biological materials. Remote sensing applications, such as contactless imaging of material structures as well as biological in vivo structures are a manifestation of the extraordinary versatility of photoacoustic methods. Photoacoustic imaging is of very high resolution and contrast. Selected aspects of photoacoustics in remote sensing, especially the possibility of remote sensing of underwater objects have been presented with the history of photoacoustics development in the background.
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