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Nonlinear frequency conversion has been proven to be an attractive alternative to access spectral regions that are inaccessible to conventional laser sources. Still, the high-power, continuous-wave (cw) ultraviolet (UV) generation, based on frequency conversion processes, has been challenging due to the short-wavelength transparency cut-off and low nonlinearity of the available nonlinear materials...
We present simple single-pass SHG of a CW ytterbium (Yb) fiber laser in MgO:sPPLT, providing a single-frequency CW power of as much as 9.64 W at 532 nm with a conversion efficiency of 32.7%. The experimental set-up consists of CW single-frequency Yb fiber laser at 1064 nm, which delivers an output power of 30 W in a linearly polarized beam of diameter of 3.0 mm, M2 factor <1.01 and instantaneous...
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