التفاصيل البيبلوغرافية
| العنوان: |
Modelling and simulation of nonlinear phenomena in microstructured optical fibres ; Modelação e simulação de fenómenos não-lineares em fibras ópticas microestruturadas |
| المؤلفون: |
Rodrigues, Sílvia Maria Gouveia |
| المساهمون: |
Ferreira, Mário F. S., Facão, Margarida M. R. V. |
| سنة النشر: |
2020 |
| المجموعة: |
Repositório Institucional da Universidade de Aveiro (RIA) |
| مصطلحات موضوعية: |
Optical fibres, Microstructured optical fibres, Nonlinear effects, Supercontinuum generation, Electromagnetically induced transparency |
| الوصف: |
This Ph.D. embraced the study of the nonlinear optical phenomena occurring in microstructured optical _bres (MOFs), also called photonic crystal fibres (PCFs). In these fibres, there are the solid-core MOFs (SC-MOFs) and the hollow-core MOFs (HC-MOFs), which allow guided propagation of light in a diversity of conditions that are not possible with conventional fibres. The mechanisms of guidance of these fibres were studied, which for SC-MOFs and HC-MOFs included the computation of the guided modes, and for the latter included also the calculation of photonic bands, bandgaps, and density of states. In addition, the dispersion curves and the nonlinearity coefficients of SC-MOFs and of gas-filled HC-MOFs were calculated. The nonlinear propagation of ultra-short pulses of light in those fibres was modeled and simulated. With the simulations of this work, the supercontinuum generation, and the UV-light generation were predicted in certain conditions. In the last part of this work the electromagnetically induced transparency effect in hollow core fibres was investigated in detail. ; Este trabalho de doutoramento englobou o estudo de fenómenos ópticos não-lineares que ocorrem em fibras ópticas microestruturadas (MOFs), também chamadas fibras de cristais fotónicos (PCFs). Nestas fibras, temos as fibras microestruturadas de núcleo solido (SC-MOFs) e as fibras microestruturadas de núcleo oco (HC-MOFs), que permitem a guiagem de luz numa diversidade de condições não atingidas com as fibras convencionais. Estudou-se os mecanismos de guiagem de luz nestas fibras, o que quer para as SC-MOFs quer para as HC-MOFs incluiu a obtenção dos modos de propagacão, e para estas últimas incluiu ainda o calculo das bandas fotónicas, bandas proíbidas, e densidade de estados. Por outro lado, as curvas de dispersão e os coeficientes não-lineares de SC-MOFs e HC-MOFs preenchidas com gases foram calculados. Também se efectuou a modelação e a simulação da propagação não-linear de impulsos ultra-curtos nestas fibras. Com as simulações deste ... |
| نوع الوثيقة: |
doctoral or postdoctoral thesis |
| اللغة: |
English |
| العلاقة: |
UID/EEA/50014/2019; UID/CTM/50025/2019; PD/BI/52527/2014; PD/BD/108650/2015; BI-14 (7409/2018); http://hdl.handle.net/10773/28955Test; 101583265 |
| الإتاحة: |
http://hdl.handle.net/10773/28955Test |
| حقوق: |
openAccess ; https://creativecommons.org/licenses/by/4.0Test/ |
| رقم الانضمام: |
edsbas.F249AC19 |
| قاعدة البيانات: |
BASE |
