A kind of tunable frequency-selective converter based on nondegenerate four
-wave mixing(ND-FWM) in semiconductor laser amplifier(SLA) is proposed in t
his paper. The coupling model of the frequency-selective converter in SLA i
s established first, and then the converting mechanism and characteristics
are analyzed. The influences of its property parameters on the output effic
iency, and the frequency shift are primarily discussed. And the property of
the output noise of the frequency-selective converter has been studied as
well. The superior performance of the converter, such as short response tim
e, high conversion efficiency, and large conversion range, makes it favorab
le for use in DWDM networks where high speed and tunableness are required.