Wavelength bistability and tunability are demonstrated in a two-section quantum-dot mode-locked laser with a non-identical capping layer structure. The continuous wave output power of 30 mW (25 mW) and mode-locked average power of 27 mW (20 mW) are achieved for 1245 nm (1295 nm) wavelengths respectively under the injection current of 300 mA. The largest switching range of more than 50 nm and wavelength tuning range with picosecond pulses and stable lasing wavelengths between 1245 nm and 1295 nm

more »

... are demonstrated for gain current of 300 mA and 330 mA. Index Terms-Laser mode-locking, quantum dot lasers, optical pulses, laser tuning, wavelength bistability.