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

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5 Author(s)
Pal, M. ; Fiber Opt. & Photonics Div., CSIR, Kolkata, India ; Saitoh, K. ; Paul, M.C. ; Ghosh, D.
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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.

Published in:

Photonics Technology Letters, IEEE  (Volume:24 ,  Issue: 18 )