Mikulla, MichaelMichaelMikullaChazan, P.P.Chazan2022-03-082022-03-081998https://publica.fraunhofer.de/handle/publica/303886The laser diode oscillator has an InAlGaAs structure with the aluminium structure formed on top on a GaAs substrate. The conducting semiconductor layer (LH) has a thickness of one micron on both sides. This provides a refractive index that is greater than that of the semiconductor material that is covered. A symmetric region (1) is formed that has a zero percent aluminium content and is within a quantum wave structure (2). USE - Solid state laser systems for material processing, eg cutting, welding or medical applications. ADVANTAGE - Improved beam quality for high power.de608621667Diodenlaser-Oszillator oder- Verstaerker mit wenigstens einer lichtleitenden HalbleiterschichtLaser diode oscillator or amplifier - has conducting layer with greater refractive index than that of encapsulated semiconductor material with symmetric region formed having zero percent aluminium content.patent1997-19717571