Ma. Summerfield et Rs. Tucker, NOISE-FIGURE AND CONVERSION EFFICIENCY OF 4-WAVE-MIXING IN SEMICONDUCTOR OPTICAL AMPLIFIERS, Electronics Letters, 31(14), 1995, pp. 1159-1160
The noise figure of an optical frequency converter based on four-wave
mixing in a semiconductor optical amplifier is defined and measured. T
he noise figure of the frequency converter is shown to be a function o
f the optical pump power, and is reduced at pump levels which are high
er than the pump power required for maximum conversion efficiency.