Abstract
An experimental investigation was made of the influence of the material used to bury mesastripe GaInPAs--InP laser heterostructures emitting in the 1.3 ..mu.. wavelength range on the order of the transverse modes of the laser radiation. Indium phosphide or GaInPAs (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 ..mu.. in the first case to approx.9 ..mu.. in the second case (for an active layer 0.25 ..mu.. thick). Leaky-mode lasing was obtained in an ''antiguiding'' strip structure with a thickness of 0.13 ..mu... Some characteristics of burial using a quaternary solid solution are discussed.
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