Abstract:
An experimental investigation was made of the influence of the material used to bury mesastripe GalnPAs–lnP laser heterostructures emitting in the 1.3 μ wavelength range on the order of the transverse modes of the laser radiation. Indium phosphide or GalnPAs (with a 1.17 eV band gap) were used for burial. It was found that the maximum single-mode width of the emission zone increased from 3 μ in the first case to ~9 μ in the second case (for an active layer 0.25 μ thick). Leaky-mode lasing was obtained in an "antiguiding" strip structure with a thickness of 0.13 μ. Some characteristics of burial using a quaternary solid solution are discussed.