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)(20~40℃) | dn/dt | 10-6/℃ | -5.3 |
CLTE (coefficient of linear thermal expansion)(20~40℃) | 10-6/℃ | 11.2 | |
Temperature coefficient of optical path (20~40℃) | ds/dt | 10-6/℃ | +0.6 |
Thermal Properties | |||
Transformation temperature | Tg | ℃ | 485 |
Softening temperature | Ts | ℃ | 520 |
CLTE (coefficient of linear thermal expansion) (100~300℃) | α | 10-7/℃ | 127 |
Thermal conductivity (25℃) | χ | Kcal/m·h·℃ | 0.50 |
Specific heat (25℃) | Cp | cal/g·℃ | 018 |
Chemical properties | |||
Durability of water(H2O,100℃,1Hr) | Dw | wt. weight loss% | 0.13 |
Durability of acid(HNO3,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 |