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Title

Limitation on effective area of bent large-mode-area leakage channel fibers

Author(s)

Saitoh, Kunimasa;  Varshney, Shailendra;  Sasaki, Kaori;  Rosa, Lorenzo;  Pal, Mrinmay;  Paul, Mukul Chandra;  Ghosh, Debashri;  Bhadra, Shyamal Kumar;  Koshiba, Masanori

Abstract

We investigate the bending characteristics of leakage channel fibers (LCFs) to achieve large mode area (LMA) and effectively single-mode operation with a practically allowable bending radius for compact Yb-doped fiber applications. Through numerical simulations, carried by the full-vectorial finite-element method, we present the limitations on the effective area of LCFs under bent condition and compare their limits with that of conventional step-index LMA fibers. Due to a better controllability of the low numerical aperture and a large value of the differential bending loss (similar to 20 dB/m) between the fundamental and higher order modes in LCFs, the LMA of similar to 500 mu m(2) (core diameter of similar to 36 mu m) at 1064 nm can be achieved when the optimized LCF is bent into a 10 cm bending radius.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Journal of Lightwave Technology, Vol. 29, no. 17 (Sep 2011), pp. 2609-2615

Publication year

2011

FOR Code(s)

0205 Optical Physics;  0906 Electrical and Electronic Engineering;  1005 Communications Technologies

Keyword(s)

Effectively single mode;  ESM;  Fibre lasers;  Large-mode-area fibres;  LCFs;  Leakage channel fibers;  LMA;  Microstructured optical fibers;  MOFs

Publisher

IEEE

ISSN

0733-8724

Publisher URL

http://dx.doi.org/10.1109/jlt.2011.2161603

Copyright

Copyright © 2011 IEEE. The accepted manuscript of the paper is reproduced here in accordance with the copyright policy of the publisher. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Full text

Peer reviewed