GaSe crystals
Main features
- Broad transparency range from 0,65 μm to 18 μm
- Large nonlinearity and birefringence
- Soft and cleaves along [001] plane
- Cannot be cut and polished at certain angles
- Comes uncoated and mounted for proper handling
Application examples
- Broadband mid-IR difference frequency generation
- Second harmonic (SH) of CO2, CO, dye lasers
- Terahertz (THz) generation by optical rectification
- Terahertz detectors for terahertz time domain spectroscopy (THz-TDS)
Request custom
- Description
- Properties
- Standard specifications
4Lasers offer z-cut, cleaved surface and mounted gallium selenide (GaSe) crystals. Custom clear apertures and crystal thicknesses from tens of microns up to several millimeters are available upon request. Due to fragile nature of GaSe it is not possible to apply antireflection coatings.
| Physical and optical properties | |
|---|---|
| Chemical formula | GaSe |
| Crystal structure | Hexagonal, -62m |
| Lattice parameters | a= 3,742 Å, c= 15,918 Å |
| Optical symmetry | Negative uniaxial (no>ne) |
| Density | 5,03 g/cm3 |
| Mohs hardness | ≈ 0 |
| Transparency range | 0,62-20 μm @ “0” transmittance level |
| Sellmeier equations | no2 = 7,443 + 0,4050/λ2 + 0,0186/λ4 + 0,0061/λ6 + 3,1485 λ2/(λ2 - 2194); ne2 = 5,76 + 0,3879/λ2 - 0,2288/λ4 + 0,1223/λ6 + 1,8550 λ2/(λ2 - 1780) |
| Refractive indices | no = 2,8158; ne = 2,4392 @10,6 μm |
| GaSe crystals | |
|---|---|
| Clear aperture | ⌀5 mm or custom |
| Surface quality | Cleaved surfaces |
| Coatings | Uncoated, unavailable |
| Mount | ⌀25,4 mm black anodized aluminum mount |
Order your item
Clear aperture
Length
Orientation
Coatings
Mount
SKU
PRICE
QUANTITY
≥⌀7 mm
0,5 mm
z-cut
uncoated
⌀25,4 mm holder
31124
1700 €
≥⌀7 mm
1 mm
z-cut
uncoated
⌀25,4 mm holder
31126
2100 €
≥⌀7 mm
2 mm
z-cut
uncoated
⌀25,4 mm holder
31127
2400 €
≥⌀7 mm
0,2 mm
z-cut
uncoated
⌀25,4 mm holder
31313
1900 €
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