关键词: Nd3+∶YCOB;单晶生长;坩埚下降法;光谱性能

Abstract: Nd3+-doped YCOB single crystal is a valuable self-double-frequency optical material applied in laser modulation technique.Nd3 + ∶ YCOB polycrystalline powder was initially synthesized by solid-state reaction at elevated temperature.High purity Nd3 + ∶ YCOB crystal grain was prepared from the polycrystalline powder by zone melting process.A series of transparent Nd3+ ∶ YCOB single crystals,with 1mol;,2mol; and 5mol; nominal Nd3+ dopant concentration,had been grown by means of vertical Bridgman method with optimized conditions.The spectral properties of as-grown crystals were characterized by measuring the absorption spectra,fluorescence spectra and fluorescence lifetime.It shows that Nd3+:YCOB crystal wafers exhibit a strong fluorescence emission centered at 1064 nm wavelength with a fluorescence lifetime of 157-162 μs upon photonic excitation with 808 nm infrared light.

Key words: Nd3+-doped YCOB single crystal is a valuable self-double-frequency optical material applied in laser modulation technique.Nd3 + ∶ YCOB polycrystalline powder was initially synthesized by solid-state reaction at elevated temperature.High purity Nd3 + ∶ YCOB crystal grain was prepared from the polycrystalline powder by zone melting process.A series of transparent Nd3+ ∶ YCOB single crystals,with 1mol;,2mol; and 5mol; nominal Nd3+ dopant concentration,had been grown by means of vertical Bridgman method with optimized conditions.The spectral properties of as-grown crystals were characterized by measuring the absorption spectra,fluorescence spectra and fluorescence lifetime.It shows that Nd3+:YCOB crystal wafers exhibit a strong fluorescence emission centered at 1064 nm wavelength with a fluorescence lifetime of 157-162 μs upon photonic excitation with 808 nm infrared light.