Temperaturna stabilizacija optičnega vlakna

GARIBOVIĆ, SANEL (author), Batagelj, Boštjan (mentor)

Cilj diplomskega dela je zasnova, izdelava in preizkus naprave za temperaturno stabilizacijo enorodovnega optičnega vlakna v skupni dolžini 15 km, ki je navito na petih aluminijastih kolutih. Ker se lastnosti enorodovnega optičnega vlakna spreminjajo s spremembo temperature, je v nekaterih posebnih primerih uporabe zahtevana temperaturna stabilizacija aluminijastih kolutov. Naprava za temperaturno stabilizacijo optičnega vlakna je zasnovana s krmilnikom Arduino Due. Diplomsko delo obsega tako opis strojne opreme kot tudi programske opreme. Glavni del diplomskega dela je izdelava programske kode za temperaturno stabilizacijo optičnega vlakna. V prvem poglavju je na kratko opisan optoelektronski oscilator, ker bo naprava za temperaturno stabilizacijo optičnega vlakna vgrajena v prototip optoelektronskega oscilatorja. V drugem poglavju je kratek opis vpliva temperature na lastnosti optičnega vlakna, kot so lomni količnik, kromatska disperzija, temperaturna sprememba nične valovne dolžine ter polarizacijska rodovna disperzija. Tu je tudi opis spremembe faze radio-frekvenčnega signala, ki se zgodi zaradi spremembe optične dolžine vlakna. V tretjem poglavju sta opis zasnove naprave za temperaturno stabilizacijo optičnega vlakna ter opis posameznih komponent. V četrtem poglavju je opisan krmilnik Arduino Due, s katerim je zasnovana naprava za temperaturno stabilizacijo optičnega vlakna. V petem poglavju sledi opis tehnike za pridobivanje analognih rezultatov z digitalnimi sredstvi, ki se imenuje pulzno-širinska modulacija. Nato je v šestem poglavju opisana PID regulacija, ki se uporablja za urejanje reguliranja temperature. Tu je še opisana metoda za nastavitev parametrov PID regulacije, s katero smo si pomagali pri nastavljanju parametrov. Sedmo poglavje zajema potek programiranja naprave za temperaturno stabilizacijo optičnega vlakna ter snovanje nastanka posameznih sklopov programa, ki so na koncu združeni v celoten program za temperaturno stabilizacijo. V osmem poglavju pa je opisana zasnova testiranja naprave za temperaturno stabilizacijo optičnega vlakna. V zaključku je predstavljena končna rešitev zastavljene hipoteze, to je izdelava programske kode za temperaturno stabilizacijo optičnega vlakna s programskim okoljem Arduino, ki bo sestavni del prototipa optoelektronskega oscilatorja, hkrati pa bo imel zelo pomembno vlogo pri uravnavanju temperature optičnega vlakna. Torej s programskim okoljem Arduino lahko izdelamo program za temperaturno stabilizacijo optičnega vlakna. Program za temperaturno stabilizacijo optičnega vlakna je prilagojen za uporabo v prototipu optoelektronskega oscilatorja.

• Language: Slovenian
• Keywords: optično vlakno, Arduino Due, pulzno-širinska modulacija, PID regulator, optoelektronski oscilator
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2016
• PID: 20.500.12556/RUL-85898
• Publication date in RUL: 28.09.2016

Secondary language

• Language: English
• Title: Temperature stabilization of the optical fiber

Abstract

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.

• Keywords: optical fiber, Arduino Due, Pulz-width modulation, PID controller, opto-electornic oscillator