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2008
Journal Article
Titel
High-power high-brightness operation of a 2.25-mu m (AlGaIn)(AsSb)-based barrier-pumped vertical-external-cavity surface-emitting laser
Alternative
Barrierengepumpter Halbleiter-Scheibenlaser auf der Basis von GaSb im Betrieb mit hoher Leistung und hoher Brillanz bei einer Emissionswellenlänge von 2.25µm
Abstract
We report on the output power performance and beam profile analysis of an optically pumped GaSb-based vertical-external-cavity surface-emitting laser operating at 2.25 mu m. The use of a SiC heatspreader and a precise control of the temperature-dependent modal gain allowed for improved high-power operation with a maximum continuous-wave output power of 3.4 W at -10 degrees C heatsink temperature. At 0 degrees C, a maximum output power >2.9 W was observed and still more than 1.6 W were obtained at room temperature. Using second-order moments for the definition of the beam diameter, a beam propagation factor of M-2 similar to 5 was measured at maximum output power. Optimizing the beam quality of the laser resulted in a beam profile close to the Gaussian TEM00 mode (M-2 approximate to 1.5) and still more than 2-W output power at 0 degrees C.
Author(s)