National Repository of Grey Literature 24 records found  previous11 - 20next  jump to record: Search took 0.01 seconds. 
Stereo image processing and visualisation
Karásek, Miroslav ; Richter, Miloslav (referee) ; Petyovský, Petr (advisor)
This thesis deals with the processing of stereo images. It described the principles of calibration and rectification of stereo images. The thesis described several methods for finding important points. SURF method is then implemented for practical solution. Finding correspondences is realized using the methods of image processing library OpenCV. Reconstructed spatial coordinates of points and write by the format specified VRML97. Finally, there is introduced evaluated accuracy of spatial data acquisition and comparison of computational cost generated programs.
Parametrické zesilování a vícenásobná generace vlnových délek ve vysoce nelineárním optickém vláknu: Experiment a modelování
Karásek, Miroslav ; Kaňka, Jiří ; Radil, J. ; Vojtěch, J.
We demonstrate parametric amplification of WDM signals and multiple wavelength conversion with gain based on four-photon parametric mixing in a highly nonlinear fibre (HNLF). Two pumps with a 100 GHz separation located in the region of anomalous dispersion of the HNLF are combined to form a beet signal. A high-power EDFA boosts the beet signal which is then combined with a signal wave by a directional coupler into the HNLF.
Optimization of NRZ data transmission at 10Gbit/s over G.652 fibre without in-line amplification
Karásek, Miroslav ; Radil, J. ; Boháč, L.
The best scheme of chromatic dispersion compensation, input powers to standard and dispersion compensating fibre have been analysed numerical with the aim to find limits of NRZ data transmission over G.652 fibre. Theoretical results have partly been verified experimentally.
Pump-controlled gain-locked Raman fibre amplifier
Karásek, Miroslav
Preliminary results of numerical simulation of pump-controlled, gain-locked Raman fibre amplifier have been presented. Numerical model of the gain-locked amplifier is based on interative solution of propagation equations for pumps, signals and spectral components of amplified spontaneous emission. Proportional-derivative feedback loop which controls the pump power has been implemented. Suppression of surviving channel power fluctuations due to channel addition/removal has been investigated.
Power transients in Raman fiber amplifiers
Karásek, Miroslav
Output power transient in Raman fibre amplifiers /RFA/ have been investigated both theoretically and experimentally. Large signal numerical model of RFA has been used for the analysis. It has been that substantial power transients can occur when WDM channels are dropped/added.
Transmission of packetized traffic over WDM through a cascade of EDFA's: experiment and simulation
Karásek, Miroslav
Transmission of burst-mode, packet data through a cascade of five erbium-doped fiber amplifiers is investigated experimetally and theoretically. Suppression of cros gain saturation in EDFAs by gain clamping the first EDFA has been studied.
Widely tunable EDF ring laser for test and measurement
Karásek, Miroslav ; Bellemare, A.
The possibilty of wideband tunability in erbium-doped fiber ring lasers is demonstrated through simulations and experiments. The laser design uses a single gain medium working in deep saturation to achieve tunability over the C and L bands.

National Repository of Grey Literature : 24 records found   previous11 - 20next  jump to record:
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