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A Ce~(3+)tion-doped α-Na YF_4 single crystal of high quality is grown successfully by an improved flux Bridgman method under the conditions of taking the chemical raw composition of Na F:KF:YF_3:CeF_3 in the molar ratio of30∶18∶48∶4, where the KF is shown to be an effective assistant flux. The x ray diffraction, absorption spectra,excitation spectra, and emission spectra of the Ce~(3+)t-doped α-Na YF_4 single crystal are measured to investigate the phase and optical properties of the single crystals. The absorption spectrum of the Ce~(3+)t:α-Na YF_4 shows a strong band that peaks at the wavelength of 300 nm. The emission spectrum of the Ce~(3+)t:α-Na YF_4 emits an intense ultraviolet(UV) band at the wavelength of 332 nm under the excitation of 300 nm light. Two separated luminous bands of 330 and 350 nm, which correspond to the transitions 5d → 2F25∕2and 5d → F7∕2, can be obtained by Gauss fitting. The strong emission intensity at the UV band and the excellent optical transmission in the range of UV wavelengths indicate that Ce~(3+)t:α-Na YF_4 single crystals can be considered as a promising material for UV lasers.
A Ce ~ (3+) tion-doped α-Na YF_4 single crystal of high quality is grown successfully by an improved flux Bridgman method under the conditions of taking the chemical raw composition of Na F: KF: YF_3: CeF_3 in the molar ratio The x-ray diffraction, absorption spectra, excitation spectra, and emission spectra of the Ce ~ (3+) t-doped α-Na YF_4 single The absorption spectrum of the Ce ~ (3+) t: α-Na YF_4 shows a strong band that peaks at the wavelength of 300 nm. The emission spectrum of the The Ce (3+) t: α-Na YF 4 emits an intense ultraviolet (UV) band at the wavelength of 332 nm under the excitation of 300 nm light. Two separated luminous bands of 330 and 350 nm, which correspond to the transitions 5d → 2F25 / 2and 5d → F7 / 2, can be obtained by Gauss fitting. The strong emission intensity at the UV band and the excellent optica l transmission in the range of UV emitters that Ce ~ (3+) t: α-Na YF 4 single crystals can be considered as a promising material for UV lasers.