Patent ID: 8798109

Claim:
A diode laser having: a first n-conducting cladding layer, a first n-conducting waveguide layer, which is arranged on the first cladding layer, an active layer, which is suitable for generating radiation and which is arranged on the first waveguide layer, a second p-conducting waveguide layer, which is arranged on the active layer, and a second p-conducting cladding layer, which is arranged on the second waveguide layer, wherein the sum of the layer thickness of the first waveguide layer, the layer thickness of the active layer and the layer thickness of the second waveguide layer is greater than 1 μm and the layer thickness of the second waveguide layer is less than 150 nm, wherein the active layer, the first cladding layer, the second cladding layer, the first waveguide layer and the second waveguide layer are designed in such a manner that the maximum mode intensity of the fundamental mode is in a region outside the active layer, and wherein the difference between the refractive index of the first waveguide layer and the refractive index of the first cladding layer is between 0.04 and 0.01.