| Physical and Optical Properties |
| Chemical formula |
Ti 3+ : Al 2 O 3 |
| Crystal structure |
Hexagonal |
| Melting point |
2050 °C |
| Density |
3.98 g/cm³ |
| Mohs hardness |
9 |
| Thermal conductivity Coefficient |
0.11 cal/(°C x sec x cm) |
| Thermal Expansion Coefficient |
|
| Lasing Wavelength |
660-1050 nm (795 nm) |
| Absorption range |
400-600 nm (488 nm) |
| Lattice constants |
a = 4.748, c = 12.957 |
| Fluorescence lifetime |
3.2 µsec (T = 300 K) |
| Absorption Coefficient |
1.0-7.5cm -1 @490nm |
| Refractive index |
1.76 @ 800 nm |
| Polarized Emission |
Unpolarized |
| Typical Specification and Tolerance |
| conentration |
0.06-0.5 wt% Ti dopant |
| Figure of Merit |
100~300 |
| Aperature |
2~50mm |
| Path Length |
2~130mm |
| End configuration |
flat/flat or Brewster/Brewster ends or Specified |
| Orientation |
Optical axis C normal to rod axis |
| Parallelism |
<10 arc seconds |
| Surface quality |
better than 60/40 scratch/dig per MIL-O-13830A |
| Surface flatness |
<λ/10 @633nm |
| Wavefront distortion |
<λ/4 per inch @ 633 nm |
| Perpendicularity |
< 5 arc minutes |
| Clear aperture |
Central 90% |
| Chamfer |
0.15x44° |
| Damage threshold |
over 15J/cm 2 (rods without coating) over 700MW/cm 2 (coating) |
| Coatings |
AR@700-1100nm |
