Influence of reflection conditions on the optoelectronic signal in AlGaAs injection lasers

An analysis is made of the influence of the reflection conditions on an optoelectronic signal obtained from injection heterolasers with different structures. The dependence of the optoelectronic signal on the pump current and on the spontaneous radiation level is considered. It is shown that the surface quality can be deduced from the optoelectronic signal. The results indicate that the strongest optoelectronic signal is obtained for lasers with lateral optical confinement and an antireflection-coated surface facing a reflector.