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    Special Glass
    Laser Glass
    Laser Glass

      JG2 laser glass has the characteristics of high concentration of neodymium ions, low n2 and low thermo-optical coefficient. Maximum size is 820mm×460mm×60mm.The properties are as follows

    Laser Properties

    Nd2O3


    wt.%

    4.10

    Nd3+ concentration


    1020ions/cm-3

    4.15

    Stimulated emission cross section

    δp

    10-20cm2

    3.6

    Fluorescence lifetime

    τ

    μsec

    310

    FWHM(full width half   maximum)

    of fluorescence line

    Δλ

    nm

    21.8

    Optical Properties

    Nonlinear refractive index

    n2

    10-13e.s.u

    1.12

    Refractive index at 1053nm

    n(1053)


    1.52005

    Refractive index at 632.8nm

    n(632.8)


    1.52793

    Refractive index at 587.6nm

    nd


    1.52962

    Refractive index at 486.1nm

    nF


    1.53515

    Refractive index at 656.3nm

    nC


    1.52718

    Abbe number

    υd


    66.5

    Brewster angle



    56°40′

    TCRI (temperature coefficient of refractive index)2040℃)

    dn/dt

    10-6/℃

    -5.3

    CLTE (coefficient of linear thermal expansion)2040℃)


    10-6/℃

    11.2

    Temperature coefficient of optical path 2040℃)

    ds/dt

    10-6/℃

    +0.6

    Thermal Properties




    Transformation temperature

    Tg

    485

    Softening temperature

    Ts

    520

    CLTE (coefficient of linear thermal expansion) (100300℃

    α

    10-7/

    127

    Thermal conductivity 25℃

    χ

    Kcal/m·h·

    0.50

    Specific heat 25℃)

    Cp

    cal/g·

    018

    Chemical properties

    Durability of waterH2O,100℃,1Hr

    Dw

    wt. weight loss%

    0.13

    Durability of acidHNO3,PH2.2,100℃,1Hr

    DA

    wt. weight loss%

    0.47

    Other properties

    Density

    ρ

    g/cm3

    2.83

    Young modulus

    E

    kgf/mm2

    5110

    Shear modulus

    G

    kgf/mm2

    2030

    Poisson ratio

    μ


    0.258

    Knoop hardness 100gf,15sec

    Hk

    kgf/mm2

    350

    Piezo-optic coefficient

    B

    nm/cm/kgf/mm2

    1.93


    Product pictures
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