DocumentCode :
50168
Title :
Joint Residual Stress/Refractive Index Characterization of Large-Mode-Area Erbium-Doped Fibers
Author :
Ting Feng ; Jenkins, M.H. ; Fengping Yan ; Gaylord, T.K.
Author_Institution :
Key Lab. of All Opt. Network & Adv. Telecommun. Network of EMC, Beijing Jiaotong Univ., Beijing, China
Volume :
31
Issue :
14
fYear :
2013
fDate :
15-Jul-13
Firstpage :
2426
Lastpage :
2433
Abstract :
The residual stress (RS) and refractive index (RI) distributions of large-mode-area (LMA) erbium-doped fibers (EDFs) are measured for the first time using a high-resolution three-dimensional index-stress distribution measurement method. The effects of fiber manufacturing, cleaving, and arc fusion splicing of a commercially available LMA EDF are concurrently characterized at state-of-the-art stress, index, and spatial resolutions. RS induced via fiber manufacturing results in RI changes as large as 1.2 ×10-4 RI units through the photo-elastic effect. The relaxation of RS within ~ 30 μm of a cleaved end-face reverses the stress-induced RI changes formed during fiber manufacturing. After fusion splicing, an even larger stress-induced RI change of 3.5 ×10-4 RI units results over an axial distance on the order of millimeters. The diffusion of core dopants reduces the maximum core RI by as much as 21.7% along a transition region length of ~ 400 μm. These measurements represent the first of many required to develop future ultra LMA EDFs where RS effects and dopant diffusion are absolutely critical for fiber design and performance.
Keywords :
erbium; internal stresses; optical fibre fabrication; optical fibre testing; refractive index measurement; splicing; stress measurement; LMA EDF; arc fusion splicing; cleaving; dopant diffusion; fiber manufacturing; large-mode-area erbium-doped fibers; photoelastic effect; refractive index characterization; residual stress characterization; spatial resolutions; stress-induced RI; three-dimensional index-stress distribution measurement; transition region length; Indexes; Optical refraction; Splicing; Stress; Stress measurement; Thermal stresses; Fiber characterization; large-mode-area erbium-doped fibers (LMA EDF); optical fibers; refractive index (RI); residual stress (RS);
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2013.2261773
Filename :
6514515
Link To Document :
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