The aim of the diploma thesis is the design, construction and testing of the device for temperature stabilization of a single-mode optical fiber with a total length of 15 km, which is coiled on five aluminum fiber spools. Because the properties of single-mode optical fibers change with temperature, in some special cases, temperature stabilization of aluminum fiber spools is needed. The device for temperature stabilization of the optical fiber is designed with the controller Arduino Due.
The diploma thesis includes both; a description of the hardware as well as software. The main part of the thesis is the production of the software code for temperature stabilization of the optical fiber.
The first chapter gives a brief description of the opto-electronic oscillator, since the device for temperature stabilization of the optical fiber will be built/installed into a prototype opto-electronic oscillator. The second chapter is a brief description of the impact of temperature on the optical fiber properties, such as refractive index, chromatic dispersion, the temperature change of the zero wavelength and polarization mode dispersion. Here it is also described the phase change of the radio-frequency signal, which occurs due to the change of the optical fiber length. The third chapter contains a description of the design of the device for temperature stabilization of the optical fiber, and a description of the individual components. The fourth chapter describes the controller Arduino Due, by which the device for the temperature stabilization of the optical fiber is designed. In the fifth chapter it is followed by a description of the techniques for getting analog results with digital means, which is called pulse-width modulation.
Then in the sixth chapter a PID controller used for the temperature control is described. There is described also a method for setting the parameters of a PID controller, which helped us in setting parameters. The seventh chapter covers the programming process of the device for temperature stabilization of the optical fiber and formation of the individual parts of the program, which eventually merged into the entire program for the temperature stabilization. The eighth chapter describes the design of the testing device for the temperature stabilization of the optical fiber. In the conclusion is presented the final achievement the production of the program for the temperature stabilization of the optical fiber in the Arduino programming environment, which will be an integral part of the prototype opto-electronic oscillator, and will also have a very important role in regulating the temperature of the optical fiber.
So in the Arduino programming environment we can create a program for optical fibre stabilization. The latter is adapted for use in a prototype of the opto-electronic oscillator.