Frequency doubling of Nd:YAG- and GaAs-lasers by KNbO3: Ta crystals |
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Authors: | N. Schmidt P. Voigt B. Hellermann K. Betzler H. Hesse S. Kapphan |
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Affiliation: | Fachbereich Physik , Universit?t Osnabrück , FRG |
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Abstract: | Abstract For KNb1-xTaxO3 crystals the influence of the Ta-concentration on the phase-matching properties for optical second harmonic generation (SHG) was measured. For non-critical phase matched SHG of the Nd:YAG-laser (1064nm) the coefficient d31 of the tensor of the nonlinear susceptibility was applied, while for the GaAs-laser (905 nm) the coefficient d32 was used. For both laser wavelengths the phase-matching temperature decreases with increasing Ta-concentration. Non-critical phase-matching at room temperature can be reached with the GaAs-laser for a Ta-concentration of ≈9%. The corresponding value for the Nd:YAG-laser is ≈14%. |
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Keywords: | sputtering yield amplification preferential sputtering enhanced sputtering |
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