No CrossRef data available.
Published online by Cambridge University Press: 21 February 2011
Characterization of the degradation processes of single mode buried heterostructure quantum well laser diodes using traditional electrooptical parameters as well as the parameters of internal second harmonic radiation (SHR) were performed. In order to observe the stages of degradation process, especially in the vicinity of catastrophic optical damage of the laser mirror, single current pulses were superimposed on DC driving current. It was shown that the intensity of SHR is indicative of the laser diode mirror working regime: the bigger SHR intensity corresponds to the bigger optical power density on the mirror and the higher risk of mirror catastrophic optical damage.