Nonlinear optical crystal AGSe (AgGaSe2)
AGSe
(silver gallium selenide)
Main properties
| Compound | AgGaSe2 | |
| Transparency range, µm | 0.76 – 18 | |
| Negative uniaxial crystal | no > ne (at λ < 0.804 μm ne > no) | |
| Nonlinear coefficient, pm/V | d36 = 39.5 @10,6 µm | |
| Symmetry | Tetragonal, -42m point group | |
| Typical Reflection index |
10.6 µm 5.3 µm |
no=2.5915, ne=2.5582 no=2.6138, ne=2.5811 |
| Optical Damage Threshold, MW/cm2 | 2000 nm (t=30 ns) |
13 |
| Walk off angle, ° | 5.3 µm | 0.68 |
| Thermal conductivity k, WM/M°C | 1.1 | |
| Band-gap energy, eV | 1.8 | |
| Optical activity ρ = 7deg/mm at isotropic point, μm | n0= ne, λ = 0.804 | |
The parameters of optical elemets
| Orientation accuracy, arc min | < 30 | |
| Parallelism, arc sec | < 40 | |
| Flatness | 546 nm | λ/4 |
| Surface quality, scratch/dig | 30/20 | |
Application
- Efficient frequency doubling for mid-IR radiation
- Optical parametric oscilation and amplification, Different frequency generation to mid-infrared regions up to 17 µm
- Optical narrow-band filters in the region near isotropical point (0.804 µm at 300 K)
Large/long optical elements are available, please, send your requests.
We are able to provide suitable Anti-reflection / Protective, etc. coatings tailored to customer’s specifications, reflectivity curves are applied upon request.