We report on a single-pass device that efficiently converts the broadband near-infrared output from a femtosecond fiber laser into a narrow spectrum in the visible. With fan-out poled we obtain subpicosecond, continuously tunable pulses in the range. Conversion efficiencies as high as 30% are observed at typical pump power levels of , corresponding to average output powers up to . The specifications of our device are ideal for applications in confocal microscopy and frequency metrology.
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