您现在的位置:首页
        产品详细
        • 产品名称: Nd:KGW
        • 产品编号: 109
        • 浏览次数: 1687

         

        Nd:KGW
        Neodymium doped Potassium-Gadolinium Tungstate crystal (Nd:KGd(WO4)2 or Nd:KGW) is an excellent laser gain material which has low laser oscillations threshold and higher emission section. The fluorescent concentration quench effect of the Nd3+ ion in the KGW crystal may be weakened due to the W-O covalent bond, so this crystal has a higher doping concentration of active ion. Furthermore, the absorption band at 808nm of Nd3+ in the KGW which has 12nm FWHM is well matched with the emission wavelength of current commercial laser diode.

        Basic Properties

        Crystal structure

        monoclinic

        Space group

        C2h(2/c)-C2/c

        Cell Parameters

         a = 8.087Å; b = 10.374 Å; c = 7.588Å
        β=94.41°

        Refractive index, at 1067 nm

        nq = 2.049; np = 1.978; nm = 2.014

        Mohs hardness

        5

        Density, g/cm3

        7.27

        Melting Point:

        1075℃

        Thermal conductivity at 373°K, W x cm-1 x °K-1

         K[100] = 0.026; K[010]= 0.038; K[001] = 0.034

        Young’s modulus, GPa

         E[100] = 115.8; E[010]= 152.5; E[001] = 92.4

        Termal expansion coefficient, at 373°K

        α[100] = 4 x 10-6 x °K-1; α[010]= 1.6 x 10-6 x °K-1;

        α[001]= 8.5 x 10-6 x °K-1

        Lasing Wavelength 911nm,1067nm,1351nm
        Absorption band 808nm(FWHM 12nm)

        Fluorescent lifetime

         110 μs (3% doping), 90 μs ( 8% doping)

        Specifications of Nd:KGW

        Orientation

        [010]

        Standard Dopant concentration (at. %)

        3%, 5%, 8%

        Maximum length

        50mm°

        Length tolerance, mm

        +1.0 / -0.0

        Diameter tolerance, mm

        +/-0.1

        Parallelism

        < 30

        Perpendicularity

        < 15'

        Surface quality

        20/10 (MIL-PRF-13830B)

        coating

        AR-coated