Laser diode

US11056857B2 · kind B2 · utility

Assignee

• Osram OLED GMBH · DE

Inventors

• Christoph Eichler · Donaustauf, DE
• Matthias Peter · Orpund, CH
• Jan Wagner · Donaustauf, DE

Key dates

• Filing date: Sep 19, 2018
• Grant date: Jul 6, 2021
• Expiry date: Sep 19, 2038

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S5/34333
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A laser diode having a semiconductor layer sequence based on a nitride compound semiconductor material includes an n-type cladding layer, a first waveguide layer, a second waveguide layer and an active layer, and a p-type cladding layer including a first partial layer and a second partial layer, wherein the first partial layer includes Alx1Ga1-x1N with 0≤x1≤1 or Alx1Iny1Ga1-x1-y1N with 0≤x1≤1, 0≤y1<1 and x1+y1≤1, the aluminum content x1 decreases in a direction pointing away from the active layer so that the aluminum content has a maximum value x1max and a minimum value x1min<x1max, and the second partial layer includes Alx2Ga1-x2N with 0≤x2≤x1min or Alx2Iny2Ga1-x2-y2N with 0≤x2≤x1min, 0≤y2<1 and x2+y2≤1.