Cm. Wu et al., Small signal analysis of frequency response of four-wave mixing in semiconductor optical amplifiers, J APPL PHYS, 87(5), 2000, pp. 2076-2078
A theory of small signal frequency response of four-wave mixing (FWM) in a
traveling wave semiconductor optical amplifier has been developed. The band
width of FWM is > 300 GHz. For large wavelength separation between the inpu
t signals, where the nonlinear gain effects dominate the generation of FWM,
the bandwidth of the FWM signal exceeds 1 THz. (C) 2000 American Institute
of Physics. [S0021-8979(00)04405-4].