1 at.% Pr³⁺ doped Y₂O₃ single crystal fiber is prepared unsing a laser beated pedestal growth method. Emission and excitation spectra of the fiber have been measured. The emissions of ¹D₂ to ³H₄ and ¹D₂ to ³H₅ 4f-4f transitions are found at 620 and 720 nm, respectively. The ³P₂, ³P₁, ¹I₆ and ³P₀, 4f-4f absorptions are observed at 456, 472, 482 and 492 nm respectively. The 4f-5d absorption band is detected at 288 nm. Photoconductivity result shows that the 4f-5d transition of Pr³⁺ produces a direct photocurrent around 285 nm. Taking the onset photocurrent at 320 nm, the ground state of Pr³⁺ is determined at 1.7 eV above the valense band of the host. One of the authors (X.J.W.) is grateful for the support by the MOST of China (2006CB601104, 2006AA03A138) and the National Natural Science Foundation of China (10574128). PACS: 72.40.+w, 71.55.Ht

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