DocumentCode :
1756263
Title :
An Optimized Vapor Phase Doping Process to Fabricate Large Core Yb-Doped Fibers
Author :
Saha, Maitreyee ; Pal, Atasi ; Pal, Mrinmay ; Guha, Chandan ; Sen, Ranjan
Author_Institution :
Fiber Opt. & Photonics Div., Central Glass & Ceramic Res. Inst., Kolkata, India
Volume :
33
Issue :
17
fYear :
2015
fDate :
Sept.1, 1 2015
Firstpage :
3533
Lastpage :
3541
Abstract :
The paper demonstrates a standardized process of vapor phase doping to fabricate large core Yb-doped preforms with longer useful length in reproducible manner. The optimization of the process led to successful achievement of Yb-doped core thickness of 4.5 mm (in 14.8 mm of preform diameter) by depositing up to 30 number of core layers with controlled amount of generated precursor vapors. The influence of the process parameters was studied rigorously to enhance the useful preform length up to 380 mm. A combination of Yb and Al in different proportions was doped into the core with uniform dopant concentration along the length by adjusting few process parameters efficiently. The Al2O3 concentration up to the level of 17.8 mol% has been achieved successfully which resulted in NA of 0.31. This is the highest ever doping of Al in passive fibers by any modified chemical vapor deposition process. The Yb2O3 content in the active fibers is as high as 0.47 mol%.
Keywords :
alumina; aluminium; chemical vapour deposition; fibre lasers; optical fibre fabrication; optical fibre testing; ytterbium; ytterbium compounds; alumina concentration; aluminium concentration; large core ytterbium-doped fiber fabrication; modified chemical vapor deposition process; optimized vapor phase doping process; size 14.8 mm; size 380 mm; size 4.5 mm; Aluminum oxide; Doping; Electron tubes; Fiber lasers; Fluid flow; Optical fibers; Preforms; Optical fiber fabrication; Optical fiber lasers; Optical fiber measurements; Optical fibers; Rare earth compounds; Vapor deposition; Ytterbium; optical fiber fabrication; optical fiber lasers; optical fiber measurements; rare earth compounds; vapor deposition;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2015.2442226
Filename :
7118643
Link To Document :
بازگشت