Design of all-solid leakage channel fibers with large mode area and low bending loss.
We investigate a novel design for all-solid large mode area (LMA) leakage channel fibers (LCFs) for high-power Yb-doped fiber lasers and amplifiers, based on a single down-doped-silica rod ring surrounding a seven-cell pure-silica core, aiming for effectively single-mode behavior and low bending loss characteristics. Through detailed numerical simulations based on the finite element method (FEM), we find that the proposed all-solid LMA-LCFs, having a seven-cell core and two different sizes of down-doped rods, can achieve sufficient differential mode loss and much lower bending loss, as compared with a previously-reported LCF with a one-cell core and six large down-doped-silica rods.
Saitoh
Kunimasa
K
Graduate School of Information Science and Technology, Hokkaido University, Sapporo 060-0814, Japan. ksaitoh@ist.hokudai.ac.jp
Tsuchida
Yukihiro
Y
Rosa
Lorenzo
L
Koshiba
Masanori
M
Poli
Federica
F
Cucinotta
Annamaria
A
Selleri
Stefano
S
Pal
Mrinmay
M
Paul
Mukul
M
Ghosh
Debasri
D
Bhadra
Shyamal
S