73 nm wavelength tuning from a frequency-doubled quantum-dot laser in PPKTP waveguides

摘要

A compact all-room-temperature CW 73-nm tunable laser source in the visible spectral region (574nm–647nm) has been demonstrated by frequency-doubling of a broadly-tunable InAs/GaAs quantum dot external-cavity diode laser in periodically-poled potassium titanyl phosphate waveguides with a maximum output power in excess of 12mW and a maximum conversion efficiency exceeding 10%. Three waveguides with different cross-sectional areas (4×4µm2, 3×5µm2 and 2x6µm2) were investigated.