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Taixing Hechen Crystal Technology Co., Ltd
Gallium Arsenide Window Plates
NegotiableUpdate on 05/19
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Overview
Gallium arsenide (GaAs) crystals have good chemical stability, high hardness, and resistance to harsh environments. It has good transmittance in the spectral range of 2000nm-14000nm and is widely used in thermal infrared imaging systems, high-power CO2 laser optical systems, and FLIR systems. In poor on-site environments where optical lenses and windows need to be repeatedly wiped, gallium arsenide is often used as a substitute for zinc selenide as the material for infrared lenses or windows.
Product Details
Gallium arsenide (GaAs) crystals have good chemical stability, high hardness, and resistance to harsh environments. It has good transmittance in the spectral range of 2000nm-14000nm and is widely used in thermal infrared imaging systems, high-power CO2 laser optical systems, and FLIR systems. In poor on-site environments where optical lenses and windows need to be repeatedly wiped, gallium arsenide is often used as a substitute for zinc selenide as the material for infrared lenses or windows.
Variation of refractive index with wavelength
| Wavelength (nm) |
Refractive index (n) | Wavelength (nm) | Refractive index (n) |
| 4000 | 3.31 | 14500 |
2.82 |
| 8000 | 3.34 | 15000 | 2.73 |
| 10000 |
3.13 |
17000 | 2.59 |
| 11000 | 3.04 |
19000 |
2.41 |
| 13000 |
2.97 |
21900 | 2.12 |
optical properties
| By wavelength range |
1000nm-14000nm |
| Absorption coefficient (1/cm) | 0.01@1500nm-11000nm |
| Thermal optical coefficient, dn/dT（1/K） | 160-120*10^-6%@3000nm-12000nm |
Physicochemical properties
| Density (g/cm3) |
5.32 |
| Melting point (℃) | 1238 |
| Thermal expansion coefficient (1/℃) | 5.7*10^ -6@300K |
| Static dielectric constant/high frame rate | 12.85/ 10.88@300K |
| Modulus of elasticity (GPa) | 101.32 |
| Shear modulus (GPa) | 55.66@298K |
| Thermal conductivity (J/k.m.s) | 55@300K |
| Heat capacity (J/g.k) |
0.32 |
| Knoop hardness (kg/mm2) |
731 |
| Water solubility (g/l) | 1.7 |
| Young's modulus (GPa) | 138.5@298K |
| Poisson's ratio | 0.31@293K |
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