Multi-ring modes generation in Yb:YAG ceramic laser |
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| Authors: | Manasadevi P. Thirugnanasambandam Yuri SenatskyAkira Shirakawa Ken-ichi Ueda |
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| Affiliation: | a Institute for Laser Science, University of Electro-communications, Chofu, Tokyo, Japan
b P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia |
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| Abstract: | A short-focus glass lens with strong spherical aberration was used for mode selection in the cw LD-end-pumped Yb:YAG ceramic laser. Sequence of low to very high order Laguerre-Gaussian (LGpl) modes with different combinations of radial, p and azimuthal, l indices (p ? 10, l ? 28), with output beam diameters 2-13 mm and power up to 30 mW was obtained. Peaked and hollow multi-ring beams with near-diffraction free propagation of the central minimum or maximum over 40 m distance from the laser resonator were observed. Mechanisms of mode selection and possible applications of the proposed laser scheme are considered. |
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| Keywords: | Yb:YAG diode pumped ceramic laser Multi-ring Laguerre-Gaussian modes |
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