Nonlinear frequency conversion of copper vapor laser radiation using convergent and parallel laser beams |
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Authors: | V T Karpukhin M M Malikov |
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Institution: | (1) Associated Institute for High Temperatures, Russian Academy of Sciences, Moscow, 127412, Russia |
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Abstract: | Results of experiments are presented on the comparison of the efficiency of radiation generation at the sum frequency (λ=0.271 μm) of copper vapor laser (CVL) in a nonlinear DKDP crystal using either convergent or parallel laser beam. An intensity of UV radiation of 0.34 W and a conversion efficiency of 6% obtained under conditions of strong focusing occur to be substantially lower as compared to those obtained using a parallel laser beam of the same power (0.73 W and 12%, respectively). Experimental data on the structure of a CVL beam generated with an unstable resonator are presented, and physical reasons for the limitation of the efficiency of nonlinear frequency conversion are analyzed. |
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