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National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Lock-in Amplifier
 Pivnička, Martin ; Šír, Michal (referee) ; Beneš, Petr (advisor)
This thesis deals with coherent demodulation by using Lock-in amplifier. The first part of this thesis focuses on theoretical analysis of this issue. The second – practical part describes design, construction and measurement of single–channel and dual–channels analog Lock-in amplifier. Further is described measurement of flow through the Coriolis flow meter by using dual-channels Lock-in amplifier. As further is described design digital Lock-in amplifier by using measuring card. The conclusion summarizes the results of measurement of Lock-in amplifier.
Detailed record
Lock-in Amplifier
 Pivnička, Martin ; Šír, Michal (referee) ; Beneš, Petr (advisor)
This thesis deals with coherent demodulation by using Lock-in amplifier. The first part of this thesis focuses on theoretical analysis of this issue. The second – practical part describes design, construction and measurement of single–channel and dual–channels analog Lock-in amplifier. Further is described measurement of flow through the Coriolis flow meter by using dual-channels Lock-in amplifier. As further is described design digital Lock-in amplifier by using measuring card. The conclusion summarizes the results of measurement of Lock-in amplifier.
Detailed record
Optimalizace algoritmu pro rekonstrukci dat z frekvenčně rozlišeného optického hradlování využívajícího křížovou fázovou modulaci v silně dvojlomném mikrostrukturním vlákně
 Vraný, Boleslav ; Honzátko, Pavel ; Kaňka, Jiří
We implemented a frequency resolved optical gating (FROG) measurement method using cross-phase modulation (XPM) in a microstructured optical fiber. The standard FROG reconstruction algorithm failed for this setup and we used the genetic algorithm (GA) instead. Although GA is slower, it is less prone to get stuck to local minima. Several parameters of GA need to be adjusted. We present the optimization process and the optimal parameters for theoretically simulated data.
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