Proceedings PaperOptical gain in Y2+:CaF2 crystal: potential medium for near-infrared tunable lasers
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Y2+ (4d1 configuration) ion is proposed to be a new laser active optical center. As an example Y2+ in CaF2 crystals demonstrates broad luminescence band with peak at 1146 nm and halfwidth of 2155 cm-1 at room temperature when excited with 532 nm light. It was observed that Y2+ centers in CaF2 are stable under excitation with 532 nm radiation with pumping power density of 233 MW/cm2 from flash-lamp pumped Q-switched Nd3+:YAG laser. Optical gain has been measured in CaF2:Y2+ amplifier at 1150 nm wavelength. It is concluded that Y2+ doped crystals seems to be promising materials for tunable solid-state lasers.