Laser diode with high efficiency

US9343873B2 · kind B2 · utility

Assignee

• Forschungsverbund Berlin e.V. · DE

Inventors

• Paul Crump · Berlin, DE
• Goetz Erbert · Plauen, DE
• Hans Wenzel · Santa Ana, US

Key dates

• Filing date: Sep 12, 2011
• Grant date: May 17, 2016
• Expiry date: Sep 13, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S2301/185
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

It is the object of the present invention to specify a light source with high efficiency and high eye safety at the same time.For this purpose, the active layer (10), the first cladding layer (14), the first waveguide layer (12), the second waveguide layer (16), and the second cladding layer (18) should be designed such that 0.01 μm≦dwL≦1.0 μm and Δn≧0.04, where dwL is the sum total of the layer thickness of the first waveguide layer (12), the layer thickness of the active layer (10), and the layer thickness of the second waveguide layer (16) and Δn is a maximum of the refractive index difference between the first cladding layer (14) and the first waveguide layer (12) and the refractive index difference between the second waveguide layer (16) and the second cladding layer (18).