Abstract
Spectral hole burning (SHB) effects in a gain-flattened erbium-doped fiber
amplifier (EDFA) are demonstrated to be significant in the presence of large signal
power around the 1530?1532-nm wavelength range. These are the first effects reported
in a setup employing equivalent power level distribution of 40 channels ranging from
1530 to 1561 nm. To explain this, the introduction of a new local population
variable into the laser equation is required to support the original inversion ratio
that is determined by the pump lasers. In the analysis section, spectroscopic
parameters and high signal powers are considered to be other contributing parameters
to the change in the gain characteristics. An improvement to this theoretical basis
is suggested by implementing mathematical modeling to validate similarities between
the gain shape of simulation to that obtained in the experiment.
© 2011 Chinese Optics Letters
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