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Soviet physics. Doklady

Coherent Combination of Fields of Single-Frequency Ruby Laser Radiation

Andrei L. Mikaelyan, Vladimir P. Minaev, V. G. Savel'Ev, Yu. G. Turkov

Published Sep 1, 1970• 0 citations
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An investigation was made of the dependence of the two-photon absorption of ruby laser radiation in alcohol solutions of rhodamine 6 G on the intensity of the exciting field in the case of single-frequency emission and emission of a large number of transverse modes. The efficiency of the two-photon absorption in the case of multimode excitation was 1.8 times (determined with a relative error of 25 % ) greater than the efficiency of the absorption as a result of single-frequency excitation. The measured absorption coefficient was close to that calculated on the assumption that the single-frequency field was spatially coherent and the spatial fluctuations of the multimode field were described by a Gaussian distribution.

Soviet Journal of Quantum Electronics•Jan 31, 1976•1 citation
An investigation was made of the dependence of the two-photon absorption of ruby laser radiation in alcohol solutions of rhodamine 6 G on the intensity of the exciting field in the case of single-frequency emission and emission of a large number of transverse modes. The efficiency of the two-photon absorption in the case of multimode excitation was 1.8 times (determined with a relative error of 25 % ) greater than the efficiency of the absorption as a result of single-frequency excitation. The measured absorption coefficient was close to that calculated on the assumption that the single-frequency field was spatially coherent and the spatial fluctuations of the multimode field were described by a Gaussian distribution.