High power green, yellow, and UV fiber lasers

We report on the development of highly stable pulsed and CW green, yellow and UV fiber based lasers. Using narrow linewidth sources and specialty fibers for high peak powers we achieve highly efficient frequency conversion in a robust single-pass configuration with >70% optical conversion to green and >20% to UV. By employing a novel wavelength extension of Yb-doped fibers we span the wavelength range of green to yellow with >35% conversion efficiency and over 25W average power.