Abstract
Transient gain saturation and recovery with
110–340-μsec time constants were observed
in erbium-doped fiber amplifiers. This slow response reduces the effects of
saturation-induced cross talk and intermodulation distortion associated with
multichannel signal amplification. In a two-channel amplification experiment,
negligible saturation-induced cross talk was measured at signal modulation
frequencies >5 kHz. Increased suppression of saturation-induced cross talk
was achieved through feed-forward compensation to reduce low-frequency gain
fluctuations.
© 1989 Optical Society of America
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