| Recent Developments in Rare-Earths Doped
Nano-Engineered Glass Based Optical Fibers
for High Power Fiber Lasers |
Mukul C. Paul,1,* S. Bysakh,2 Shyamal Das,1 Anirban Dhar,1 M. Pal,1 S. K. Bhadra,3
J. K. Sahu,4 A. V. Kir’yanov5 and F. d’Acapito6
pages : 195-208
DOI : 10.1080/0371750X.2016.1251852 |
| Abstract |
| Recent advances of development of rare-earth (RE) doped optical fibers have become
increasingly important due to their applications in various optoelectronic devices such as
high power optical fiber amplifiers, fiber lasers, etc. We present a review of recent progress
on development of RE-doped glass host based optical fiber materials with special emphasis
on large mode area fibers for efficient laser and amplifier. The challenging task is to manage
high power inside the active core otherwise output power instability would affect the beam
quality. Best solution is to use suitable dopants in addition to active elements during the
process of fabrication. Modified chemical vapour deposition (MCVD) process combined with
solution doping technique is deployed to develop RE-doped nano-engineered glass based
optical fibers through suitable thermal annealing of optical preforms. The developed doped
fibers are characterized by DTA, TEM, XRD, XAS, EPMA and EXAFS to assess the structural
parameters. This new class of optical fiber materials will open up new possibilities for extended
functionality and greater optoelectronic integration.
[Keywords: Fiber optics, REs doped materials, MCVD solution doping technique, Nanoengineered
glass, High resolution transmission electron microscopy, Fiber laser] |
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