Influence of the relative bias current injection in the coupling of twin stripe diode lasers

In this work a study of the dependence of the coupling in laterally coupled diode lasers (LCDL) with the relative bias conditions is presented. The study is made by the analysis of the spectrally resolved near and far field optical spectrum combined with the frequency responses of these devices at different bias conditions. By the analysis of these measurements it was observed that three different operation regions appear, and are identified by the spectral phase relation between the fields emitted by each laser stripe.