Nonlinear optical crystal GaSe
GaSe
(gallium selenide)
Main properties
| Compound | GaSe | |
| Transparency range, µm | 0.62 – 20 | |
| Nonlinear coefficient, pm/V | d22 = 54 @10.6 µm | |
| Symmetry | hexagonal, 6m2 point group | |
| Cell parameters, Å | a=3.74, c=15.89 | |
| Typical Reflection index |
10.6 µm 5.3 µm |
no=2.6975, ne=2.3745 no=2.7233, ne=2.3966 |
| Optical Damage Threshold, MW/cm2 |
1064 nm (t=10 ns) |
30 |
| Walk-off angle, ° | 5.3 µm | 4.1 |
Application
- SHG of 10.6 µm laser radiation
- Optical Parametric Oscillation, Amplification, DFG, etc. to mid-IR up to 17 µm
We are able to provide suitable Anti-reflection / Protective, etc. coatings tailored to customer’s specifications, reflectivity curves are applied upon request.