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A study on Laguerre‐Gaussian (LG) modes selection in cw and pulsed Nd:YAG or Yb:YAG ceramic lasers pumped by diodes or an external laser source was carried out. Methods of scalar and vector LG modes selection from low to high orders, involving shaping of the pump profile, usage of intra‐cavity lenses, uniaxial crystals and polarization selective mirrors, are considered. CCD camera images of beam profiles...
The use of a simple short‐focus plano‐convex glass lens with strong spherical aberration for Laguerre‐Gaussian mode selection in a continuous wave (CW) LD‐end‐pumped Yb:YAG ceramic laser is demonstrated. Mode selection was obtained in a nearly meter long plane‐parallel cavity by shifting an intra‐cavity lens of 2.5 cm focal length along the resonator axis. Sequence of Laguerre‐Gaussian (LGp,l) modes...
The present work offers a scheme where a simple plano-convex intracavity lens with a strong spherical aberration was used in Yb:YAG laser for the generation of ndf beams. A 9.8% at. Yb:YAG ceramics plane-parallel plate (9x11x1.1 mm) mounted on a copper cooler was end-pumped by a cw fiber-coupled laser diode at room temperature. The pump radiation (power 0.1-1.5 W) was focused into the plate to a circular...
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