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National Repository of Grey Literature 2 records found  Search took 0.02 seconds. 
Design and optimization of technological procedures for writing apodized Bragg fiber gratings
 Folk, Jan ; Čučka, Milan (referee) ; Urban, František (advisor)
This master thesis deals with the problem of Fiber Bragg Gratings. It describes the technology of production of these gratings and focuses on the individual technological processes such as hydrogenation and stripping the primary optical fiber coating. It also deals with the apodization of Bragg gratings, describing the individual apodization functions. This paper includes the design of a specific tool for fiber transfer from the window stripping device. The issue of maintaining purity while working with an optical fiber without its coating, is also described. The next part of the thesis deals with the optimization of input parameters for writing fiber Bragg gratings (FBG) on the device used in NETWORK GROUP, s.r.o. Optimization of input parameters is very necessary to enable the writing of only apodized fiber gratings on the used assembly. This thesis deals with the evaluation and optimization of the technological procedures for the creation of apodized FBGs. The thesis also addresses the individual parameters of apodized FBGs and focuses on the repeatability of the manufacturing process.
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Fiber gratings for sensing and design of nonlinear structures
 Helán, R. ; Šifta, R. ; Urban, F. ; Urban jr., F. ; Mikel, Břetislav ; Krátký, Stanislav ; Kolařík, Vladimír
This paper focuses on the research and development of optical nonlinear FBG structures using the so-called nonlinear chirp, which produces the desired type of filter. Such created nonlinear structures can shape the spectrum of an optical radiation source intended to evaluate FBG-based sensors.
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