Abstract
THE fourth harmonic of a Q-spoiled high-intensity neodymium-in-glass laser was produced using the nonlinear optic effect in two KDP (potassium dihydrogen phosphate) crystals. The laser output pulse at 1.06µ has been converted successively to 5300 Å and 2650 Å. The purpose of the communication is to report these experimental results and to point out the potential importance of this high-intensity spatially coherent radiation at 2650 Å.
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JOHNSON, F. Quadruple Frequency Multiplication of a l.06-µ Neodymium-pulsed Laser. Nature 204, 985–987 (1964). https://doi.org/10.1038/204985a0
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DOI: https://doi.org/10.1038/204985a0
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