Subpicosecond high-power mode locking using flared waveguide monolithic quantum-dot lasers

Ultrashort pulse, high-power mode locking is demonstrated in InGaAs quantum dot lasers using a flared waveguide laser incorporating a narrow waveguide sections acting as both a mode filter and saturable absorber. 24 GHz mode locking with 780 fs pulses and 500 mW peak powers are demonstrated at an emissions wavelength of 1.3 mu m.