A new Yb-doped niobate, 5at%Yb :GdNbO₄, has been grown by Czochralski method. The structures of Yb: GdNbO₄were determined by Retvield refine to their X-ray powder diffraction. Their diffuse reflection spectra, photo-luminescence spectra and lifetime at room temperature were measured and the corresponding energy level transitions were assigned, respectively. Then spectroscopic parameters of Yb: GdNbO₄ were calculated and compared with Yb: YNbO₄, Yb: GdTaO₄ and Yb:YAG. Results indicated that Yb: GdNbO₄ crystal is advantageous for tunable and ultrafast pulse laser output and will be a new promising Yb laser material pumed by LD.

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1. Growth and spectroscopic characteristics of 2.7-3 μm Er:GYSGG laser crystal