21 February 2011 All quantum dot based femtosecond VECSEL
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Abstract
Using quantum well gain materials, ultrafast VECSELs have achieved higher output powers (2.1 W) and shorter pulses (60 fs) than any other semiconductor laser. Quantum dot (QD) gain materials offer a larger inhomogeneously broadened bandwidth, potentially supporting shorter pulse durations. We demonstrate the first femtosecond QD-based VECSEL using a QD-SESAM for modelocking, obtaining 63 mW at 3.2 GHz in 780-fs pulses at 960 nm. In continuous wave operation we obtained 5.2 W using an intra-cavity diamond heat spreader, which has been the highest output power from a QD-VECSEL so far. Further power scaling is thus expected also for modelocked operation.
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M. Hoffmann, M. Hoffmann, O. D. Sieber, O. D. Sieber, W. P. Pallmann, W. P. Pallmann, V. J. Wittwer, V. J. Wittwer, I. L. Krestnikov, I. L. Krestnikov, S. S. Mikhrin, S. S. Mikhrin, D. A. Livshits, D. A. Livshits, G. Malcolm, G. Malcolm, C. Hamilton, C. Hamilton, Y. Barbarin, Y. Barbarin, T. Südmeyer, T. Südmeyer, U. Keller, U. Keller, } "All quantum dot based femtosecond VECSEL", Proc. SPIE 7919, Vertical External Cavity Surface Emitting Lasers (VECSELs), 79190X (21 February 2011); doi: 10.1117/12.873731; https://doi.org/10.1117/12.873731
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