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Watt-level, gigahertz-linewidth difference-frequency generation in PPLN pumped by an nanosecond-pulse fiber laser source

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Abstract

We obtained >1W average power and up to 5 μJ pulse energy at 3520nm wavelength via difference-frequency generation (DFG) of an all-fiber, few-ns pulse, variable pulse-repetition-frequency laser source operating at 1064 nm and 10 mW, continuous-wave, 1525 nm single-frequency diode laser, within a 5 cm-long periodically poled lithium niobate (PPLN) crystal. To the best of our knowledge, this result amounts to the highest-average-power, spectrally bright mid-infrared radiation obtained via DFG.

© 2015 Optical Society of America

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