8 W single-emitter InGaN laser in pulsed operation
| Autor: | Matthias Sabathil, Christoph Eichler, Alfred Lell, Sönke Tautz, Uwe Strauß, Stefanie Brüninghoff, Stephan Lutgen |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
business.industry Slope efficiency Optical power Surfaces and Interfaces Condensed Matter Physics Epitaxy Laser Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Semiconductor laser theory Resonator Optics law Materials Chemistry Optoelectronics Electrical and Electronic Engineering business Current density Common emitter |
| Zdroj: | physica status solidi (a). 206:1149-1152 |
| ISSN: | 1862-6319 1862-6300 |
| Popis: | We present the investigation of an optimized epitaxial layer structure in order to reach high optical output powers of several watts. The influence of an interlayer, which is located between the multiple quantum well layers and the electron blocking layer, is analysed carefully. For high current densities the leakage current density increases with increasing interlayer thickness. Correlating the leakage current density with the injection efficiency it is found that by decreasing the interlayer thickness constant injection efficiency for high current regions can be reached. This is essential for a linear laser characteristic up to high optical output power levels. Further enhancement can be achieved by enlarging the total waveguiding layer structure. As a result the optical power density in the resonator was decreased. With these improvements threshold current density and slope efficiency of 2.7 kA/cm 2 and 2.1 W/A can be achieved. The optical output power is increased to 8.7 W for a 20 μm broad single-emitter ridge-waveguide laser in pulsed operation. |
| Databáze: | OpenAIRE |
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