title: Efficient graphene saturable absorbers on D-shaped optical fiber for ultrashort pulse generation.
abstract: We demonstrated a method to construct high efficiency saturable absorbers based on the evanescent light field interaction of CVD monolayer graphene deposited on side-polished D-shaped optical fiber. A set of samples was fabricated with two different core-graphene distances (0 and 1 μm), covered with graphene ranging between 10 and 25 mm length. The mode-locking was achieved and the best pulse duration was 256 fs, the shortest pulse reported in the literature with CVD monolayer graphene in EDFL. As result, we find a criterion between the polarization relative extinction ratio in the samples and the pulse duration, which relates the better mode-locking performance with the higher polarization extinction ratio of the samples. This criterion also provides a better understanding of the graphene distributed saturable absorbers and their reproducible performance as optoelectronic devices for optical applications.
authors: MackGraphe - Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, São Paulo/SP, Brasil.|Universidad de Antioquia, Medellin, Colombia.
authors: J D
authors: JD
authors: Zapata
authors: MackGraphe - Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, São Paulo/SP, Brasil.
authors: D
authors: D
authors: Steinberg
authors: MackGraphe - Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, São Paulo/SP, Brasil.
authors: L A M
authors: LA
authors: Saito
authors: MackGraphe - Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, São Paulo/SP, Brasil.
authors: R E P
authors: RE
authors: de Oliveira
authors: Universidad de Antioquia, Medellin, Colombia.
authors: A M
authors: AM
authors: Cárdenas
authors: MackGraphe - Graphene and Nanomaterials Research Center, Mackenzie Presbyterian University, São Paulo/SP, Brasil.
authors: E A Thoroh
authors: EA
authors: de Souza