YAG (Yttrium Aluminum Garnet) crystal combines advantages in many basic properties, it is a stable compound, mechanically robust, physically hard, optically isotropic, and transparent from below 300nm to nearly 5 microns. YAG single crystal is able to accept trivalent Rare Earth and Transition Metal groups’ laser activator ions, and can be grown with very low strain, became the most widely produced laser gain host. LNG Optics provide Nd3+:YAG, Er3+:YAG, Yb3+:YAG, Tm3+:YAG and CTH:YAG laser crystals, Cr4+:YAG passive Q-switch elements and pure YAG optics. We also accept contract growth of special doping YAG crystals according to customers’ requirements.
Features & Standard Specifications from LNG Optics:
Laser Rods: Flat/Flat, Parallel/Antiparallel wedged, Brewster angle, Concave/convex radii
Laser Slabs andLaser Disks
Diffusion Bonded elements (composite doped YAG with Cr:YAG or pure YAG)
“Cold” Laser Slab modules
Barrel: 50-80 micro-inch (RMS) / Prepolished / Grooved
Orientation: <111> +/-5°
Dimension (diameter) Tolerance: ±0.05mm
Length Tolerance: ±0.5mm
Surface Quality: 10/5 Scratch/Dig
Surface Flatness: λ/10 @ 633nm
Wavefront Distortion:λ/10 per inch @ 633nm
Extinction Ratio: 25dB per inch
Parallelism: 10 arc seconds (Plano/Plano)
Perpendicularity: 5 arc minutes
Chamfer 0.1mm x 45°
Coating: AR, HR, PR with high LIDT > 10J/cm²@ 1064nm 10ns 10Hz
Other special coatings are available upon request
|
Laser Gain Properties: |
Nd:YAG |
Er:YAG |
Yb:YAG |
Tm:YAG |
CTH:YAG |
|
Lasing action |
4 level |
4 level |
Quasi 3 level |
Quasi 3 level |
4 level |
|
Current dopant level in LNG (at%) |
0.2 – 1.2 |
50 |
0.2 – 25 |
0.5 – 5 |
Ho 0.35+Tm 5.8+Cr 1.5 |
|
Lasing/wavelength (nm)* |
4F3/2→4I11/2/1064 |
4I11/2→4I13/2/2940 |
2F5/2→2F7/2/1030 |
3F4→3H6/2013 |
5I7→5I8/2094 |
|
Gain bandwidth (nm) |
0.5 |
N/A |
9 |
N/A |
N/A |
|
Emission Cross-Section (×10-20cm2) |
28 @ 1.0 at% |
3 |
1.86 |
2.9 |
0.7 |
|
Spontaneous Fluorescent Lifetime (μs) |
230 @ 1.0 at% |
100 |
1200 |
11000 |
8500 |
|
Refractive Index |
1.82 |
1.79 @ 2940nm |
1.82 @ 1030nm |
1.80 @ 2000nm |
1.80 @ 2094nm |
|
Pump wavelength (nm) |
808.6 |
600-800 |
941 |
785 |
781 |
|
Absorption bandwidth (nm) |
1.0 |
N/A |
8 |
N/A |
4.0 |
* Other transition wavelengths are available upon request.