This paper reports the growth, X-ray diffraction and spectroscopy of Nd3+:Sr3Gd2(BO3)4 crystal. A Nd3+:Sr3Gd2(BO3)4 crystal with dimensions of φ20 × 45 mm3 has been grown by the Czochralski method. Nd3+...This paper reports the growth, X-ray diffraction and spectroscopy of Nd3+:Sr3Gd2(BO3)4 crystal. A Nd3+:Sr3Gd2(BO3)4 crystal with dimensions of φ20 × 45 mm3 has been grown by the Czochralski method. Nd3+:Sr3Gd2(BO3)4 crystal belongs to the orthorhombic system, space group Pnma (D2h) with a = 0.7401, b = 1.604 and c = 0.8755 nm. The absorption and emission spectra of Nd3+:Sr3Gd2(BO3)4 were investigated. The absorption cross section oa is 3.11 × 10^-20cm2 at 808 nm. The absorption transition at 808 nm has an FWHM of 14 nm. The luminescence lifetime τf is 51.7 μs. The emission cross section oc at 1064 nm wavelength is 1.09 × 10^-19 cm2.展开更多
A Sr3Yb2(BO3)4 single crystal was obtained by the Czochralski method. The structure of Sr3Yb2 (BO3)4 crystal was determined by single-crystal X-ray diffraction. The compound crystallizes in orthorhombic, space gro...A Sr3Yb2(BO3)4 single crystal was obtained by the Czochralski method. The structure of Sr3Yb2 (BO3)4 crystal was determined by single-crystal X-ray diffraction. The compound crystallizes in orthorhombic, space group Pnma with a=7.3750(8), b=15.9265(14), c=8.6776(9), V=1019.25(18)3 , Mr=844.18, Z=4, Dc=5.501 g/cm3 , λ(MoKa)=0.71073, μ= 33.835 mm-1 , F(000)=1480, the final R=0.0339 and wR=0.0907 for 1090 observed reflections with I〉2σ(I). The structure features a three-dimensional framework composed of isolated BO3 planar triangles bridged by YbO8 and SrO8 polyhedra. The Sr2+ and Yb3+ occupy statistically three independent sites with a Cm and two C1 local symmetries.展开更多
Optical characteristics and upconversion dynamics of Er3+ in Er3+/Yb3+:LiLa(MoO4)2 crystals were investigated. The absorption spectra, fluorescence spectra and the fluorescence decay curves were analyzed at room tempe...Optical characteristics and upconversion dynamics of Er3+ in Er3+/Yb3+:LiLa(MoO4)2 crystals were investigated. The absorption spectra, fluorescence spectra and the fluorescence decay curves were analyzed at room temperature. The infrared emission at 1538 nm and visible emissions at 520–569 and 640–670 nm, corresponding to 2H11/2,4S3/2→4I15/2 and 4F9/2→4I15/2 transitions of Er3+ ions, were simultaneously observed in Er3+/Yb3+:LiLa(MoO4)2 crystals under 976 nm excitation at room temperature. The maximal emiss...展开更多
End-pumped by a 976 nm diode laser,a high-repetition-rate Er:Yb:YAl3(BO3)4 microchip laser passively Q-switched by a Co2+:MgAl2 O4 crystal is reported.At a quasi-continuous-wave pump power of 20 W,a 1553 nm passively ...End-pumped by a 976 nm diode laser,a high-repetition-rate Er:Yb:YAl3(BO3)4 microchip laser passively Q-switched by a Co2+:MgAl2 O4 crystal is reported.At a quasi-continuous-wave pump power of 20 W,a 1553 nm passively Q-switched laser with the repetition rate of 544 kHz,pulse duration of 8.3 ns,and pulse energy of 3.9 μJ was obtained.To the best of our knowledge,the 544 kHz is the highest reported value for the 1.5 μm passively Q-switched pulse laser.In the continuous-wave pumping experiment,the maximum repetition rate of 144 kHz with the pulse duration of 8.0 ns and pulse energy of 1.7 μJ was obtained at the incident pump power of 6.3 W.展开更多
文摘This paper reports the growth, X-ray diffraction and spectroscopy of Nd3+:Sr3Gd2(BO3)4 crystal. A Nd3+:Sr3Gd2(BO3)4 crystal with dimensions of φ20 × 45 mm3 has been grown by the Czochralski method. Nd3+:Sr3Gd2(BO3)4 crystal belongs to the orthorhombic system, space group Pnma (D2h) with a = 0.7401, b = 1.604 and c = 0.8755 nm. The absorption and emission spectra of Nd3+:Sr3Gd2(BO3)4 were investigated. The absorption cross section oa is 3.11 × 10^-20cm2 at 808 nm. The absorption transition at 808 nm has an FWHM of 14 nm. The luminescence lifetime τf is 51.7 μs. The emission cross section oc at 1064 nm wavelength is 1.09 × 10^-19 cm2.
基金Supported by the National Natural Science Foundation of China (51002152)the Natural Science Foundation of Fujian Province (2010J05125)
文摘A Sr3Yb2(BO3)4 single crystal was obtained by the Czochralski method. The structure of Sr3Yb2 (BO3)4 crystal was determined by single-crystal X-ray diffraction. The compound crystallizes in orthorhombic, space group Pnma with a=7.3750(8), b=15.9265(14), c=8.6776(9), V=1019.25(18)3 , Mr=844.18, Z=4, Dc=5.501 g/cm3 , λ(MoKa)=0.71073, μ= 33.835 mm-1 , F(000)=1480, the final R=0.0339 and wR=0.0907 for 1090 observed reflections with I〉2σ(I). The structure features a three-dimensional framework composed of isolated BO3 planar triangles bridged by YbO8 and SrO8 polyhedra. The Sr2+ and Yb3+ occupy statistically three independent sites with a Cm and two C1 local symmetries.
基金Project supported by the National Natural Science Foundation of China (60808033) Natural Science Foundation of Jiangxi Province (2008GZW0012)
文摘Optical characteristics and upconversion dynamics of Er3+ in Er3+/Yb3+:LiLa(MoO4)2 crystals were investigated. The absorption spectra, fluorescence spectra and the fluorescence decay curves were analyzed at room temperature. The infrared emission at 1538 nm and visible emissions at 520–569 and 640–670 nm, corresponding to 2H11/2,4S3/2→4I15/2 and 4F9/2→4I15/2 transitions of Er3+ ions, were simultaneously observed in Er3+/Yb3+:LiLa(MoO4)2 crystals under 976 nm excitation at room temperature. The maximal emiss...
基金supported by the National Natural Science Foundation of China (Nos.61875199 and 61975208)Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDB20000000)Science and Technology Service Network Initiative of the Chinese Academy of Sciences (No.KFJ-STS-QYZX-069)。
文摘End-pumped by a 976 nm diode laser,a high-repetition-rate Er:Yb:YAl3(BO3)4 microchip laser passively Q-switched by a Co2+:MgAl2 O4 crystal is reported.At a quasi-continuous-wave pump power of 20 W,a 1553 nm passively Q-switched laser with the repetition rate of 544 kHz,pulse duration of 8.3 ns,and pulse energy of 3.9 μJ was obtained.To the best of our knowledge,the 544 kHz is the highest reported value for the 1.5 μm passively Q-switched pulse laser.In the continuous-wave pumping experiment,the maximum repetition rate of 144 kHz with the pulse duration of 8.0 ns and pulse energy of 1.7 μJ was obtained at the incident pump power of 6.3 W.