In this paper, the spectral and luminescence properties of a series of KGd（WO4）2 powder samples codoped with different concentrations of Er^3＋ and Yb^3＋ were reported,and the best doping concentrations were found ...In this paper, the spectral and luminescence properties of a series of KGd（WO4）2 powder samples codoped with different concentrations of Er^3＋ and Yb^3＋ were reported,and the best doping concentrations were found to be lat% Er^3＋ and 10at% Yb^3＋ for attaining the strongest intensity. The Er^3＋/yb^3＋ codoped KGd（WO4）2 crystal with good optical quality was grown by the TSSG method and the growth conditions were presented. The unpolarized absorption and emission spectra of the crystal have been measured. The strong absorption peak is at 980 nm with a FWHM of 65 nm, and the emission peak is at 1536 nm when pumped by 976 rim. The fluorescence lifetime of manifold ^4I13/2 is estimated to be 4.5 ms at room temperature.Investigations of Er, Yb：KGW crystal have shown it to have necessary combination of properties to get an effective generation of - 1.54 μm eye-safe radiation with laser diode pumping.展开更多
With a type-I noncritically phase-matched LiB_(3)O_(5) crystal as the intracavity frequency doubler in a diode pumped Nd:YVO_(4) laser,440mW of 671 nm light was obtained at 5.5W of incident pump power,the optical-opti...With a type-I noncritically phase-matched LiB_(3)O_(5) crystal as the intracavity frequency doubler in a diode pumped Nd:YVO_(4) laser,440mW of 671 nm light was obtained at 5.5W of incident pump power,the optical-optical conversion efficiency being 8.0%.展开更多
The title compound (γ-CH3C5H4N)2Zn(S2C2 (CN )2 ) crystallizes in theorthorhombic system, space group C2221, with a= 10. 069 (2), b= 14. 629 (4), c=11. 923(4) A, V= 1756. 2(3) A3, Dc= 1. 48g/cm3, Z=4, Mr= 391.81. λ(M...The title compound (γ-CH3C5H4N)2Zn(S2C2 (CN )2 ) crystallizes in theorthorhombic system, space group C2221, with a= 10. 069 (2), b= 14. 629 (4), c=11. 923(4) A, V= 1756. 2(3) A3, Dc= 1. 48g/cm3, Z=4, Mr= 391.81. λ(MoKa)= 0. 71069 A, μ= 16. 6 cm--l, F(000) = 800, final R= 0. 055 and Rw= 0. 066 for.1481 observed reflections with I≥3σ(I). In the (γ-CH3C5H4N)2Zn(S2C2(CN)2 ) complex, Zn2+ is coordinated by two nitrogen atoms from two 4--methylpyridine ligands andtwo sulfur atoms from maleonitriledithiol ligand. The powder tests show a frequencydoubling effect 2. 4 times as great as KH2PO4, which is in consistency with theoreticalcalculations展开更多
基金This project was supported by the Natural Science Foundation of Fujian Province (No. E0310031) ② Corresponding author. E-mail: tcy@fjirsm.ac.cn
文摘In this paper, the spectral and luminescence properties of a series of KGd（WO4）2 powder samples codoped with different concentrations of Er^3＋ and Yb^3＋ were reported,and the best doping concentrations were found to be lat% Er^3＋ and 10at% Yb^3＋ for attaining the strongest intensity. The Er^3＋/yb^3＋ codoped KGd（WO4）2 crystal with good optical quality was grown by the TSSG method and the growth conditions were presented. The unpolarized absorption and emission spectra of the crystal have been measured. The strong absorption peak is at 980 nm with a FWHM of 65 nm, and the emission peak is at 1536 nm when pumped by 976 rim. The fluorescence lifetime of manifold ^4I13/2 is estimated to be 4.5 ms at room temperature.Investigations of Er, Yb：KGW crystal have shown it to have necessary combination of properties to get an effective generation of - 1.54 μm eye-safe radiation with laser diode pumping.
基金Supported by the National Advanced Materials Commit tee of the"863 Program"under Grant No.863-715-001-00.
文摘With a type-I noncritically phase-matched LiB_(3)O_(5) crystal as the intracavity frequency doubler in a diode pumped Nd:YVO_(4) laser,440mW of 671 nm light was obtained at 5.5W of incident pump power,the optical-optical conversion efficiency being 8.0%.
文摘The title compound (γ-CH3C5H4N)2Zn(S2C2 (CN )2 ) crystallizes in theorthorhombic system, space group C2221, with a= 10. 069 (2), b= 14. 629 (4), c=11. 923(4) A, V= 1756. 2(3) A3, Dc= 1. 48g/cm3, Z=4, Mr= 391.81. λ(MoKa)= 0. 71069 A, μ= 16. 6 cm--l, F(000) = 800, final R= 0. 055 and Rw= 0. 066 for.1481 observed reflections with I≥3σ(I). In the (γ-CH3C5H4N)2Zn(S2C2(CN)2 ) complex, Zn2+ is coordinated by two nitrogen atoms from two 4--methylpyridine ligands andtwo sulfur atoms from maleonitriledithiol ligand. The powder tests show a frequencydoubling effect 2. 4 times as great as KH2PO4, which is in consistency with theoreticalcalculations
