Abstract
In wavelength-division-multiplexing systems with optical
amplifiers, channel drop or add can cause power changes in the existing
channels. We present an analytical formula for the transient power
of the existing channels as a function of time when one or more input
channel is dropped or added on an erbium-doped fiber amplifier
(EDFA). Although this formula was originally derived from
perturbation theory of single-stage EDFA’s, it is a good approximation
of large-power excursion cases as well as two-stage EDFA’s.
© 1999 Optical Society of America
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