Open AccessBend-resistant leaky multi-trench fiber with large mode area and single-mode operation
Author(s) -
Shaoshuo Ma,
Tigang Ning,
Pei Li,
Jing Li,
Z. Jiao,
Xiaoyu He,
Xiaodong Wen
Publication year - 2018
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0203047
Subject(s) - bend radius , trench , materials science , bending , optics , fiber , radius , single mode optical fiber , optoelectronics , equilibrium mode distribution , mode volume , fiber laser , mode (computer interface) , graded index fiber , mode field diameter , optical fiber , composite material , physics , fiber optic sensor , computer science , computer security , layer (electronics) , operating system
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.