Dissulfeto de molibdênio esfoliado micromecanicamente depositado em fibra óptica para geração de pulsos ultracurtos
Arquivos
Tipo
Dissertação
Data de publicação
2016-08-01
Periódico
Citações (Scopus)
Autores
Aiub, Eduardo José
Orientador
Saito, Lúcia Akemi Miyazato
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Matos, Christiano José Santiago de
Spadoti, Danilo Henrique
Spadoti, Danilo Henrique
Programa
Engenharia Elétrica
Resumo
In this work, we describe the characterization, transfer process and fabrication of
mechanically exfoliated MoS2 (molybdenum disulfide) samples deposited on the
fiber facet and D-shaped fiber. The characterization of these samples was made
through Raman spectroscopy, making a mapping of the samples and analyzing
the frequency difference between the vibrational modes E2g e A1g, it is possible
to determine the number of layers to be transferred. Also, it was required
to prepare a layered substrate of PVA (polyvinyl alcohol) and PMMA (Polymethyl-
methacrylate), so that it was possible to remove the nanomaterial from
the glass substrate and deposit it on another surface. Furthermore, it was performed
control and alignment of the material with the core of the fiber, using
a stage XYZ and an optical microscope (10X lens). An application for the fabricated
samples was demonstrated through the generation of ultrashort pulses
in EDFL (Erbium-doped fiber lasers) and YDFL (Ytterbium-doped fiber lasers)
using them as saturable absorbers. The best results obtained were a pulse duration
of 810 femtoseconds and bandwidth of 4.09 nm using mechanically exfoliated
MoS2 on the fiber facet and pulse duration of 200 fs and bandwidth of 20,5 nm
on the D-shaped fiber. In the samples on the fiber facet was the presence of
NPR (Nonlinear Polarization Rotation) resulting in a hybrid effect. Results of
ultrashort pulses with mechanically exfoliated MoS2 have not yet been reported
in the literature.
Descrição
Palavras-chave
dissulfeto de molibdênio , absorvedor saturável , pulsos ultracurtos , laser a fibra dopada com érbio/ itérbio , fibra óptica de perfil D
Assuntos Scopus
Citação
AIUB, Eduardo José. Dissulfeto de molibdênio esfoliado micromecanicamente depositado em fibra óptica para geração de pulsos ultracurtos. 2016. 58 f. Dissertação (Engenharia Elétrica) - Universidade Presbiteriana Mackenzie, São Paulo .