|
|
Nonlinear phenomena in optical fibers
Burian, Radek ; Horváth, Tomáš (referee) ; Münster, Petr (advisor)
The subject of this thesis is to describe nonlinear phenomena in the optic fiber. The theoretical part describes a principle of transmission in optical fibers. Optics modules, fibers and their parameters are described marginally. Except nonlinear phenomena, there is also described linear phenomena such as attenuation, dispersion, scattering. In terms of nonlinear phenomena there is described second order phenomena such as Second harmonic generation (SHG), Sum and difference harmonic generation (SFG and DFG) and third order phenomena, such as Kerr effect, Third harmonic generation (THG), Four-wave mixing (FWM) and Cross phase modulation (XPM). There are also described nonlinear scattering, such as Raman´s and Brillouin´s scattering. The Four-wave mixing is simulated in the first half of the practical part. Four-wave mixing occurs in DWMD systems, where can invoke cross-talks between channels. In the second half of the practical part is measured this nonlinear phenomenon. The aim of the measurement is to understand the behaviour of the FWM and find the way how to eliminate its power. The Four-wave mixing measurement is based on the simulation. Second measurement is designed for Brillouin scattering. The conclusion from simulated and laboratory part from both measurements are compared with theoretical knowledge.
|
|
|
Femtosecond lasers and their applications
Oškera, Jakub ; Urban, František (referee) ; Münster, Petr (advisor)
Bachelor thesis deals with the definition of a laser, its properties and its use in practise. Work describes the basic principle of laser beam with associated individual laser types and comparison to conventional light radiation source. Next, work focuses on modes of transmission: continuous, pulse, and main differences among them. Next part describes femtosecond lasers and their generating pulses. The work contains theoretical design of measurements used for this particular laser. The theoretical concept is designed for the field of spectroscopy. The thesis mentions the basic methods of spectroscopy: ultravioletvisible, Raman and IR. Part of this work is also focused on WattJoule application software that has been programmed for the use in experimental measurement. This experimental measurement is described in the last part of this bachelor thesis. The purpose of the measurement is an attempt of connection of the laser beam into optical fiber. The conclusion discusses the description and outcome of this experimental measurement.
|
|
|
Interactive Interface for Robot Remote Control for Android
Robotka, Vojtěch ; Materna, Zdeněk (referee) ; Španěl, Michal (advisor)
The development of autonomous robots has made a significant progress and first personal robots for common use start to appear. To use this robots, we need to develop applications and user interfaces to interact with them. The goal of this project is to make a universal interface for robot remote control. This work focuses on robots based on the ROS platform. This gives the final application a potential of use on other robotic projetcs running on ROS. The designed remote interface accomplishes two main purposes. The first is to show important data in a context of a 3D scene to help user understand the state of the controlled robot. And the second goal is to allow the user execute some basic manipulation with the robot. The final application was successfully adapted and tested on experimental robots Care-O-Bot and Turtlebot.
|
|
|
Interactive Interface for Robot Remote Control
Lokaj, Tomáš ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
This work deals with the interactive interface for remote controlled robots and examines some of the existing visualization and simulation tools and robotic platforms. It also designs and implements interactive elements suitable for representation of detected objects, such as bounding box or billboard, and proposes interactive elements to eliminate some of the problems associated with remote control of the robot, such as bad perception of distances and the orientation in the environment. The interactive interface is implemented in the Robot Operating System using offered means for visualization, communication and operations management. Graphics primitives are represented by Interactive Markers that, in addition to the visualization, offers also possibilities of interaction. With these markers, a simple tool for controlling the movement of the robot is designed.
|
|
|
Nonlinear phenomena in optical fibers
Burian, Radek ; Horváth, Tomáš (referee) ; Münster, Petr (advisor)
The subject of this thesis is to describe nonlinear phenomena in the optic fiber. The theoretical part describes a principle of transmission in optical fibers. Optics modules, fibers and their parameters are described marginally. Except nonlinear phenomena, there is also described linear phenomena such as attenuation, dispersion, scattering. In terms of nonlinear phenomena there is described second order phenomena such as Second harmonic generation (SHG), Sum and difference harmonic generation (SFG and DFG) and third order phenomena, such as Kerr effect, Third harmonic generation (THG), Four-wave mixing (FWM) and Cross phase modulation (XPM). There are also described nonlinear scattering, such as Raman´s and Brillouin´s scattering. The Four-wave mixing is simulated in the first half of the practical part. Four-wave mixing occurs in DWMD systems, where can invoke cross-talks between channels. In the second half of the practical part is measured this nonlinear phenomenon. The aim of the measurement is to understand the behaviour of the FWM and find the way how to eliminate its power. The Four-wave mixing measurement is based on the simulation. Second measurement is designed for Brillouin scattering. The conclusion from simulated and laboratory part from both measurements are compared with theoretical knowledge.
|
|
|
Femtosecond lasers and their applications
Oškera, Jakub ; Urban, František (referee) ; Münster, Petr (advisor)
Bachelor thesis deals with the definition of a laser, its properties and its use in practise. Work describes the basic principle of laser beam with associated individual laser types and comparison to conventional light radiation source. Next, work focuses on modes of transmission: continuous, pulse, and main differences among them. Next part describes femtosecond lasers and their generating pulses. The work contains theoretical design of measurements used for this particular laser. The theoretical concept is designed for the field of spectroscopy. The thesis mentions the basic methods of spectroscopy: ultravioletvisible, Raman and IR. Part of this work is also focused on WattJoule application software that has been programmed for the use in experimental measurement. This experimental measurement is described in the last part of this bachelor thesis. The purpose of the measurement is an attempt of connection of the laser beam into optical fiber. The conclusion discusses the description and outcome of this experimental measurement.
|
|
|
Interactive Interface for Robot Remote Control
Lokaj, Tomáš ; Beran, Vítězslav (referee) ; Španěl, Michal (advisor)
This work deals with the interactive interface for remote controlled robots and examines some of the existing visualization and simulation tools and robotic platforms. It also designs and implements interactive elements suitable for representation of detected objects, such as bounding box or billboard, and proposes interactive elements to eliminate some of the problems associated with remote control of the robot, such as bad perception of distances and the orientation in the environment. The interactive interface is implemented in the Robot Operating System using offered means for visualization, communication and operations management. Graphics primitives are represented by Interactive Markers that, in addition to the visualization, offers also possibilities of interaction. With these markers, a simple tool for controlling the movement of the robot is designed.
|
|
|
Interactive Interface for Robot Remote Control for Android
Robotka, Vojtěch ; Materna, Zdeněk (referee) ; Španěl, Michal (advisor)
The development of autonomous robots has made a significant progress and first personal robots for common use start to appear. To use this robots, we need to develop applications and user interfaces to interact with them. The goal of this project is to make a universal interface for robot remote control. This work focuses on robots based on the ROS platform. This gives the final application a potential of use on other robotic projetcs running on ROS. The designed remote interface accomplishes two main purposes. The first is to show important data in a context of a 3D scene to help user understand the state of the controlled robot. And the second goal is to allow the user execute some basic manipulation with the robot. The final application was successfully adapted and tested on experimental robots Care-O-Bot and Turtlebot.
|
guest ::
