Abstract
A wideband erbium-doped fiber amplifier (EDFA) is demonstrated using an
Erbium-doped zirconia fiber as the gain medium. With a combination of both
Zr and Al, we could achieve a high erbium doping concentration of 4320 ppm
in the glass host without any phase separations of rare-earths. The Erbium
doped fiber (EDF) is obtained from a fiber preform, which is fabricated in a
ternary glass host, zirconia-yttria-aluminum codoped silica fiber using a
MCVD process. Doping of Er$_{2}$O$_{3}$ into Zirconia yttria-aluminosilicate based glass is done through
solution doping process. The maximum gain of 21.8 dB is obtained at 1560 nm
with 2 m long of EDF and co-pumped with 1480 nm laser diode. At high input
signal of ${-}4$ dBm, a flat-gain at average value of 8.6 dB is obtained with a
gain variation of less than 4.4 dB within the wavelength region of
1535–1605 nm and using 3 m of EDF and 100 mW pump power. The
corresponding noise figure is maintained below 9.6 dB at this wavelength
region.
© 2010 IEEE
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