Influence of a strong magnetic field on the radiation emitted from an InP injection laser

The spectral characteristics of an InP injection laser were investigated at 77°K in a pulse magnetic field B up to 300 kG. The threshold current decreased somewhat with increasing magnetic field but it rose again in fields B > 100 kG. The spectral shift toward shorter wavelengths was a nonlinear function of the magnetic field and it amounted to about 10 meV. The nature of this shift indicated participation of localized states in the active transitions in the laser.