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With a multi-pass cavity we avoid modelocking instabilities of low-repetition rate VECSELs due to short gain lifetime. We achieve a record-low repetition rate of 257 MHz which we could not realize with the conventional cavity.
We developed novel low-dispersion VECSELs modelocked with fast QD-SESAMs. The first femtosecond modelocked QD-VECSEL achieves 1 W average power with 784-fs pulses. At lower power, we achieved sub-500-fs pulses both with QW- and QD-VECSELs.
An ultrafast electrically-pumped VECSEL design requires adjustments between electrical resistance, optical losses, dispersion and cw output power. Validating our simulations with homogeneous current injection in large devices, 120 mW cw output power are generated.
An ultrafast electrically-pumped VECSEL design requires an acceptable trade-off in cw output power. Validating our design guidelines and simulations 120 mW cw output power are generated. Homogenous current injection is even achieved for large devices.
The authors demonstrate up to 4.35 W output power from a Stranski-Krastanow grown quantum dot semiconductor disk laser (SK-QD SDL), representing a 15 times increase in power from the previous published maximum power in the work of Germann et al. (2008), and the first multi-Watt output from any QD SDL. The experimental demonstration of a multi-Watt power level continuous wave operation of QD based...
We report the first entirely quantum-dot-based SESAM-modelocked VECSEL, using quantum-dot layers for gain and absorber. We obtain 22 mW average output power at 1053 nm wavelength in 10-ps pulses with 2.54 GHz repetition rate.
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