Nd:KGW Crystal
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STANDARD SPECIFICATIONS
|
Orientation |
[010] ±30 min |
|
Dopant concentration |
2-10 at % |
|
Diameter tolerance |
+0.0/-0.1 mm |
|
Length tolerance |
+1.0/-0.0 mm |
|
Chamfer |
45(±10) deg × 0.2(±0.1) mm |
|
Flatness |
λ/10 @ 633 nm |
|
Parallelism |
better than 30 arcsec |
|
Perpendicularity |
better than 15 arcmin |
|
Surface finishing |
10/5 scratch/dig |
|
Absorption losses |
< 0.005 cm-1 |
Physical and Laser Properties
|
Chemical formula |
KGd(WO4):Nd |
|
Lattice constants |
a = 8.095 Å, b = 10 Å, c = 7.588 Å |
|
Optical orientation |
ng = b, npc = 20 deg |
|
Angle between optical axis |
86.5 angular grad |
|
Density |
7.27 g/cm3 |
|
Mohs hardness |
5 |
|
Thermal conductivity |
2.8 W/(m×grad) [100] 2.2 W/(m×grad) [010] 3.5 W/(m×grad) [001] |
|
Thermal expansion |
4×10-6 grad-1 [100] 3.6×10-6 grad-1 [010] 8.5×10-6 grad-1 [001] |
|
Phase transition |
1005°C |
|
Melting point |
1075°C |
|
Transmission range |
0.35-5.5 µm |
|
Refractive indice |
ng = 2.033 @ 1.067 µm |
|
Transition |
4F3/2 -> 4I11/2 |
|
Laser wavelength |
1.0672 µm |
|
Fluorescence lifetime |
120 µs |
|
Fluorescence width |
24 cm-1 |
|
Emission cross-section |
4.3×10-19 cm-2 |
|
Emission cross-section |
8.5×10-4 nm, K-1 |
| EKSMA Optics Nd:KGW Crystals
62.99 kB |
Nd:KGW crystals are low lasing threshold highly efficient laser material exceptionally suitable for laser rangefinding applications. The efficiency of Nd:KGW lasers is 3–5 times higher than that of Nd:YAG lasers. Nd:KGW laser medium is one of the best choices ensuring effective laser generation at low pump energies (0.5–1 J). These crystals feature high optical quality and great value of bulk resistance to laser radiation. Existing technology produces single crystals of up to 3 kg, thus allowing reliable and high yield fabrication of round elements of up to 12 mm in diameter and up to 120 mm in length.
