The experimental observation of a side-mode resonance regime in intermodal
injection of a Fabry-Perot semiconductor laser is reported. It is shown tha
t wavelength switching can be easily affected by the use of positively detu
ned side-mode injection. Nearly degenerate four-wave mixing is observed in
both positive and negative detuning regimes. (C) 2000 American Institute of
Physics. [S0003- 6951(00)02522-5].