Estudo das propriedades ópticas do grafeno e sua aplicação como absorvedor saturável em lasers à fibra dopada com érbio
In this thesis, we present results on the fabrication, transfer and characterization of chemical vapor deposition (CVD) graphene and exfoliated graphene over glass and optical fiber substrates, to study optical properties of graphene and its application as a saturable absorber for Erbium-doped fiber...
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| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Brasil |
| Institución: | Universidade Presbiteriana Mackenzie (MACKENZIE) |
| Repositorio: | Repositório Digital do Mackenzie |
| Idioma: | portugués |
| OAI Identifier: | oai:dspace.mackenzie.br:10899/24262 |
| Acceso en línea: | http://dspace.mackenzie.br/handle/10899/24262 |
| Access Level: | acceso abierto |
| Palabra clave: | grafeno número de camadas de grafeno empilhamento transferência de grafeno esfoliado absorvedor saturável fibra óptica pulsos ultracurtos laser à fibra dopada com érbio graphene number of graphene layers stacking exfoliated graphene transfer saturable absorber optical fiber ultrashort pulses erbium-doped fiber laser CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA |
| Sumario: | In this thesis, we present results on the fabrication, transfer and characterization of chemical vapor deposition (CVD) graphene and exfoliated graphene over glass and optical fiber substrates, to study optical properties of graphene and its application as a saturable absorber for Erbium-doped fiber laser (EDFL). Monolayer CVD graphene and stacked CVD graphene samples were fabricated and characterized, transferred to the transverse face of optical fibers, and a study on the relation between the optical properties of graphene samples and the properties of ultrashort laser pulses generated in (EDFL) was performed. Furthermore, we have developed a technique for transferring exfoliated nanomaterials which allowed us to transfer exfoliated graphene onto optical fiber s faces and align the graphene flake to the fiber core. With this transfer technique it is possible to fabricate samples with controlled number of graphene layers onto optical fiber faces. As application, we demonstrate ultrashort pulse generation in Erbium-doped fiber laser with exfoliated monolayer graphene samples as saturable absorber. This is the first time that ultrashort laser pulses are generated with a single exfoliated monolayer graphene sample. |
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