Modelocked quantum dot vertical external cavity surface emitting laser
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- Hoffmann, M., Barbarin, Y., Maas, D.J.H.C. et al. Appl. Phys. B (2008) 93: 733. doi:10.1007/s00340-008-3267-0
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We report the first successful modelocking of a vertical external cavity surface emitting laser (VECSEL) with a quantum dot (QD) gain region. The VECSEL has a total of 35 QD-layers with an emission wavelength of about 1060 nm. In SESAM modelocked operation, we obtain an average output power of 27.4 mW with 18-ps pulses at a repetition rate of 2.57 GHz. This QD-VECSEL is used as-grown on a 450 μm thick substrate, which limits the average output power.