Blue 450nm high power semiconductor continuous wave laser bars exceeding rollover output power of 80W
| Autor: | M. Baumann, Christoph Eichler, V. Krause, Harald König, J. Malchus, Uwe Strauss, Andreas Löffler, Bernhard Stojetz, Matthias Peter, Alfred Lell, Muhammad Ali, A. Balck |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Bar (music) Far-infrared laser Energy conversion efficiency 02 engineering and technology Welding Heat sink 021001 nanoscience & nanotechnology Laser 01 natural sciences law.invention 010309 optics law 0103 physical sciences Continuous wave Optoelectronics 0210 nano-technology business Diode |
| Zdroj: | High-Power Diode Laser Technology XVI. |
| Popis: | Industrial material processing like cutting or welding of metals is rather energy efficient using direct diode or diode pumped solid state lasers. However, many applications cannot be addressed by established infrared laser technology due to fundamental material properties of the workpiece: For example materials like copper or gold have too low absorption in the near infrared wavelength range to be processed efficiently by use of existing high power laser systems. The huge interest to enable high power kW systems with more suitable wavelengths in the blue spectral range triggered the German funded research project 'BLAULAS': Therein the feasibility and capability of CW operating high power laser bars based on the GaN material system was investigated by Osram and Laserline. High performance bars were enabled by defeating fundamental challenges like material quality as well as the chip processes, both of which differ significantly from well-known IR laser bars. The research samples were assembled on actively cooled heat sinks with hard solder technology. For the first time an output power of 98W per bar at 60A drive current was achieved. Conversion efficiency as high as 46p at 50W output power was demonstrated. |
| Databáze: | OpenAIRE |
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