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Earth-Mars optical link budget program
Marčák, Tomáš ; Róka, Rastislav (referee) ; Hudcová, Lucie (advisor)
The master’s thesis is focused on the design and development of a program for calculating the relative positions of the planets Earth and Mars in the solar system. The aim of this thesis was to study and present the current and planned possibilities of optical and laser communication between Earth and Mars. Subsequently, the thesis presents the design of the program, which is complemented by the theoretical calculation of the relative positions of the planets Earth – Mars in the solar system. This program further plots the planets themselves in the solar system with their orbits. Another focus of the thesis is the design of an optical link and the subsequent analysis of the optical link budget between the planets Earth and Mars.
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Indoor optical wireless link design
Kaňa, Leoš ; Tošovský, Petr (referee) ; Hudcová, Lucie (advisor)
In last years phenomena of wireless communication technologies became a primary interest of big development laboratories whole world. Domain of point to point links which are realized by laser technology with narrow beam divergence and very sensitive photo-detectors is ordinarily used these days. This trend of using light waves as carrier medium turned interests of scientist to the sphere of wide area networks which is domain of wi-fi radio technologies. One of new trends in this sphere is also in-door free space optics. With expansion which leads to using LED's in everyday applications and with technological progress of last years, also grows tendency of most effective utilization of LED systems. The result of this effort is thought which considerate LED as source of artificial lighting and source of carrier medium for modulated signal. This kind of device must fulfill hygienic standards for illumination and also must be able to work with high frequency by which is signal modulated. These systems can provide links with sufficient capacity in order of hundred megabits.
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Indoor optical wireless link design
Kaňa, Leoš ; Tošovský, Petr (referee) ; Hudcová, Lucie (advisor)
In last years phenomena of wireless communication technologies became a primary interest of big development laboratories whole world. Domain of point to point links which are realized by laser technology with narrow beam divergence and very sensitive photo-detectors is ordinarily used these days. This trend of using light waves as carrier medium turned interests of scientist to the sphere of wide area networks which is domain of wi-fi radio technologies. One of new trends in this sphere is also in-door free space optics. With expansion which leads to using LED's in everyday applications and with technological progress of last years, also grows tendency of most effective utilization of LED systems. The result of this effort is thought which considerate LED as source of artificial lighting and source of carrier medium for modulated signal. This kind of device must fulfill hygienic standards for illumination and also must be able to work with high frequency by which is signal modulated. These systems can provide links with sufficient capacity in order of hundred megabits.
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Semiconductor lasers for metrology and telecommunications
Růžička, Bohdan
The subject of my work is realisation of a semiconductor source of coherent radiation in the infra-red area with relative frequency stability at least of 10.sup.-8./sup., which could become the basis of a future etalon of wavelengths for optical communication in the Czech Republic. I am a member of a research team which solves these problems at the workplace of the Institute of Scientific Instruments of the Academy of Sciences of the Czech Republic.
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