Abstract
Signal gain-saturation characteristics in a fiber optical parametric amplifier
are described. Experiments and calculations for the high-gain-saturation region
are presented in which the direction of optical power transfer, which is from
the pump to the signal and the idler in the unsaturated region, becomes reversed
at high-signal-input powers. It is shown that the signal gain soon saturates
for signal wavelengths far from the pump. This wavelength dependence is explained
by the power-dependent phase mismatch and its behavior in the high-signal-input
region.
© 2001 Optical Society of America
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