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External-cavity mode-locking of a quantum-dot laser is demonstrated with record-low repetition-rates of 310 MHz, and harmonic repetition-rates up to 4 GHz. Fourier-limited 930 fs pulse generation is achieved. The pulse-energy of ~0.45 pJ is independent of operating conditions.
We report a GaInNAs/GaAs semiconductor disk laser with fundamental emission in the 1150-1200 nm waveband, allowing frequency-doubled operation to the yellow/orange. Output power was 1W at 1197 nm with a slope efficiency of 23%.
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