| Texto completo | |
| Autor(es): |
de Freitas, F. p. r.
;
Teinberg, D. S.
;
Rosa, H. G.
;
de Souza, E. a thoroh
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | OPTICAL MATERIALS EXPRESS; v. 12, n. 12, p. 12-pg., 2022-12-01. |
| Resumo | |
We experimentally investigated the saturable absorption influence of graphene layers with natural stacking order in an erbium-doped fiber laser passive mode-locking. Mechanically exfoliated graphene saturable absorber (MEGSA) samples, ranging from 1 to 6 layers, were fabricated preserving their natural ABA stacking order and precisely characterized by 2D band profile from Raman spectroscopy. By incorporating the samples as saturable absorbers (SA) in the fiber laser, mode-locking performances with pulse duration from 670-780 fs and bandwidth from 3.8-4.6 nm could be generated. Also, we identified a transition in the mode-locking activation mechanism from non-self-starting, for monolayer and bilayer graphene, to self-starting, for trilayer and few-layer graphene, which is a strong indicative of fast-to-slow saturable absorption response dependence on the number of graphene layers. (AU) | |
| Processo FAPESP: | 12/50259-8 - Grafeno: fotônica e opto-eletrônica: colaboração UPM-NUS |
| Beneficiário: | Antonio Helio de Castro Neto |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa SPEC |
| Processo FAPESP: | 16/25836-2 - Fontes de pulsos ultracurtos e altas taxas de repetição baseadas em materiais 2D |
| Beneficiário: | Juan Diego Zapata Caro |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 15/11779-4 - Efeitos plasmônicos e não-lineares em grafeno acoplado a guias de onda ópticos |
| Beneficiário: | Christiano José Santiago de Matos |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |