Design and Fabrication of Large-Mode Area Air-Clad Leakage Channel Fiber With Superior Bending Characteristics

Author

Pal, Mrinmay ; Saitoh, Kunimasa ; Paul, M.C. ; Ghosh, Debashri ; Bhadra, S.K.

Author_Institution

Fiber Opt. & Photonics Div., CSIR, Kolkata, India

Volume

24

Issue

18

fYear

2012

Firstpage

1650

Lastpage

1652

Abstract

We investigate the bending characteristics of leakage channel fibers (LCFs) to achieve large-mode area and effectively single-mode operation with a practically allowable bending radius of 5 cm for compact Yb-doped fiber laser applications. We design and fabricate a two-ring air-clad LCF whose bending characteristics have been studied both by numerical analysis through the full-vectorial finite element method and experimentally. The LCF has bend-loss of 0.09 dB/m and effective area of 350 μm² for a 5-cm bending radius. The single-mode nature of the bent LCF at 1064 nm is presented.

Keywords

bending; fibre lasers; finite element analysis; optical fibre cladding; optical fibre fabrication; ring lasers; ytterbium; bend-loss; bending characteristics; bending radius; compact fiber laser application; full-vectorial finite element method; large mode area air clad leakage channel fiber; numerical analysis; ring air-clad leakage channel fiber; single mode operation; size 5 cm; wavelength 1064 nm; Fabrication; Fiber lasers; Finite element methods; Frequency modulation; Optical fibers; Preforms; Silicon compounds; Bending characteristics; fiber laser; large-mode area (LMA) fiber; leakage channel fiber (LCF);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2212006

Filename

6269989