Estudo das propriedades ópticas do grafeno e sua aplicação como absorvedor saturável em lasers à fibra dopada com érbio

Imagem de Miniatura
Tipo
Tese
Data
2015-02-25
Autores
Rosa, Henrique Guimarães
Orientador
Souza, Eunézio Antônio de
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Matos, Christiano José Santiago de
Gomes, José Carlos Viana
Fragnito, Hugo Luis
Paula, Ana Maria de
Programa
Engenharia Elétrica
Resumo
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.
Descrição
Palavras-chave
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
Citação
ROSA, Henrique Guimarães. Estudo das propriedades ópticas do grafeno e sua aplicação como absorvedor saturável em lasers à fibra dopada com érbio. 2015. 128 f. Tese (Doutorado em Engenharia Elétrica) - Universidade Presbiteriana Mackenzie, São Paulo, 2015.