Wide wavelength tunability and green laser operation of diode-pumped Pr3+:KY3F10

We report on wide spectral tunability of a quasi-continuous wave Pr3+:KY3F10 laser under InGaN laser diode excitation at 445 nm. The total tuning range exceeded 100 nm in the visible spectral range on several intervals between 521 nm and 737 nm. The broadest continuously tunable region of almost 50 nm extended from 688 nm to 737 nm. Furthermore we present what is to the best of our knowledge the first demonstration of continuous wave laser operation in Pr3+:KY3F10 on three transitions in the green spectral region. The highest output power of 121 mW was achieved at an emission wavelength of 554 nm with a slope efficiency of 27%. (C) 2013 Optical Society of America