ABSTRACT
Passive mode-locked pulses with repetition frequencies in the range 40 to 90 GHz were observed in blue-violet GaN-based quantum-well lasers without external cavities. The lasers had two-section geometry with built-in saturable absorber section. The individual pulses had durations as short as 3–5 ps at peak powers of around 320 mW.
The research leading to these results was funded by the European Community's Seventh Framework Programme under Grant Agreement No. 238556 (FEMTOBLUE).
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