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Gain enhancement in partial double-pass L-band EDFA system using a band-pass filter

✍ Scribed by S. W. Harun; N. Md Samsuri; H. Ahmad

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 80 KB
Volume: 2
Category: Article
ISSN: 1612-2011
DOI: 10.1002/lapl.200410130

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✦ Synopsis

The partial double-pass L-band erbium-doped fiber
amplifier with enhanced gain characteristic is demonstrated using
a band pass filter (BPF). The BPF is incorporated in the
double-pass route to suppress the amplified spontaneous emission
from the single-pass output for gain enhancing. The gain of
51.5 dB is obtained for the proposed amplifier at input signal
power of -40 dBm, which is approximately 5.2 dB higher compared
with the system without the BPF. However, the insertion loss of
the BPF contributes to a small noise figure penalty in the system.
This amplifier can be easily modified to support dense wavelength
division multiplexing system application by using multiple channel
BPFs or interleaver.

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