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 1μm), covered with graphene ranging between 10 and 25mm length. The mode-locking was achieved and the best pulse duration was 256fs, 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.

• Autores: Zapata Caro, Juan Diego; Steinberg, David; Saito, Lucía; Oliveira, Rafael de; Cárdenas Soto, Ana María; Thoroh de Souza, Eunézio Antonio
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2016
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/7727
• Acceso en línea: http://hdl.handle.net/10495/7727
• Palabra clave: Grafeno; Fibra óptica; Pulsos ultracortos
• Rights: openAccess
• License: Atribución 2.5 Colombia (CC BY 2.5 CO)