Solid-state green-light-emitting upconversion coherent random laser in macroporous LiNbO3:Er
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摘要:
A solid-state green-light-emitting upconversion coherent random laser was realized by pumping macroporous erbium-doped lithium niobate with a 980 nm laser.The lasing threshold was determined to be about 40 kW/cm2.Above the threshold,the emission intensity increased sharply with the increasing pump intensity.Moreover,a narrow multi-peaks structure was observed in the green-light-emission band,and the positions of lasing lines were various at different angles.The results were the direct evidences of coherent random lasing emission from macroporous erbium-doped lithium niobate.These phenomena were attributed to the coexistence of upconversion emission and a multiple scattering feedback mechanism.