Patent ID: 8811442

Claim:
A semiconductor laser having at least one quantum film in which electron hole pairs can be recombined, having at least two barrier layers between which respectively one of the at least one quantum films is disposed adjacently to these, directly in a planar manner or via respectively one intermediate film, and also having an optical pump device, the barrier layers having or consisting of Al z Ga 1-z As y Sb 1-y , with y greater than or equal to zero and less than or equal to one and z less than or equal to one and greater than 0.4, or having or consisting of Al z Ga u In v As y Sb 1-y , with z+u+v=1 and z greater than 0.5, the electron hole pairs being able to be produced directly in the quantum film with the optical pump device, wherein photons can be introduced into the quantum film by the optical pump device, the energy of which photons is less than or equal to the band gap energy of the barrier layers but greater than the band gap energy of the quantum film.