Nonlinear optical crystal LISe (LilnSe2)
LISe
(lithium indium selenide)
Main properties
| Compound | LilnSe2 | |
| Transparency range, µm | 0.43– 13.2 | |
| Nonlinear coefficient, pm/V | d31=11.78, d24=8.17 @2.3 µm | |
| Symmetry | Orthorhombic, mm2 point group | |
| Cell parameters, Å | a=7.192, b=8.412, c=6.793 | |
| Band gap, eV | 2.86 | |
| Typical Reflection index |
10.0 µm 5.0 µm |
nx=2.2015, ny=2.2522, nz=2.2566 |
| The fundamental wavelength ranges in µm for SHG | x-y, Type II, eoe | 2.73 – 8.24 |
|
x-z, Type I, ooe |
2.08 – 12.4 | |
|
y-z, Type II, oeo |
2.73 – 3.07 |
|
|
y-z Type II, oeo |
7.66 – 8.24 |
|
|
Total interval covered |
2.08 – 12.4 |
|
| Optical Damage Threshold, GW/cm2 | 1064 nm (t=10 ns) |
~40 |
| Thermal conductivity k, WM/M°C | kx=4.73 ± 0.3; ky=4.67 ± 0.3; kz=5.45 ± 0.3 | |
| Band-gap energy at room temperature, eV | Eg = 2.73 | |
| Absorption edge in the far-IR on 0.2 transparency level | 1.24 THz at 240 µm | |
The parameters of optical elements
| Orientation accuracy, arc min | < 30 | |
| Parallelism, arc sec | < 30 | |
| Flatness | 546 nm | λ/4 |
| Surface quality, scratch/dig | 30/20 | |
Application
- Optical parametric oscillation (OPO) in range 1 – 13 µm with pump Ti: Sapphire laser
- Different frequency generation in middle IR range (2-13 µm)
- For all crystals we are able to provide suitable Anti-reflection / Protective Coatings tailored to customer’s specific applications, providing reflectivity curves.
We are able to provide suitable Anti-reflection / Protective, etc. coatings tailored to customer’s specifications, reflectivity curves are applied upon request.