Bend-resistant leaky multi-trench fiber with large mode area and single-mode operation

A novel structure of modified multi-trench fiber (MTF) with characteristics of bend-resistance and large mode-area is proposed. In this structure, each low refractive-index trench of traditional MTF is broken by two gaps up and down. Numerical investigations show that the mode field area of 840 μm(2...

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Detalles Bibliográficos
Autores principales: Ma, Shaoshuo, Ning, Tigang, Pei, Li, Li, Jing, Zheng, Jingjing, He, Xueqing, Wen, Xiaodong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2018
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6116992/
https://www.ncbi.nlm.nih.gov/pubmed/30161209
http://dx.doi.org/10.1371/journal.pone.0203047
Descripción
Sumario:A novel structure of modified multi-trench fiber (MTF) with characteristics of bend-resistance and large mode-area is proposed. In this structure, each low refractive-index trench of traditional MTF is broken by two gaps up and down. Numerical investigations show that the mode field area of 840 μm(2) can be achieved with effective single-mode (SM) operation when the bending radius is 15 cm. Moreover, the high order mode (HOM) suppression of the proposed design is better than that of standard MTF. The SM operation property can be enhanced with the decreases of bending radius. The proposed design shows great potential in high power fiber lasers with compact structure.

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