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We present optical characterization and laser results achieved with single-crystal fibers directly grown by the micro-pulling-down technique. We investigate the spectroscopic and optical quality of the fiber, and we present the first laser results. We achieved a cw laser power of 10 W at 1064 nm for an incident pump power of 60 W at 808 nm and 360 kW peak power for 12 ns pulses at 1 kHz in the Q-switched regime. It is, to the best of our knowledge, the highest laser power ever achieved with directly grown single-crystal fibers.

Full concentration range of Lu 2x Gd 2-2x SiO 5 (LGSO:Ce) crystals was grown by the Czochralski method. Dependence of scintillation properties on composition (х) in the range of solid solutions is established. It was determined that LGSO:Ce scintillation yield increases in the range 0.3<х< 0.8 and reaches 29000 phot/MeV at 60% of Lu in the host (x=0.6), and energy resolution improves up to 6.7 % at 662 KeV. The observed light yield increase, surprisingly high Ce

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