An experimental technique for generating the 1.318- and 1.064-μm Nd:YAG lines simultaneously is described. The system is used for studying three-wave mixing (3WM) in three commercially available nonlinear crystals. Emission of both 1.064 and 1.318 μm from this single laser makes it possible to generate simultaneously a number of sum frequencies in addition to laser harmonics. The visible frequencies include 0.659, 0.589, 0.532, 0.44 and 0.407 μm.
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