Cr:LiSAF レーザ結晶
Cr-doped Colquiriite-Cr:LiSAF
CASTECH provides high quality, Cr-doped colquiriite crystals(Cr:LiSAF) using the Czochralski technique. This family of materials includes LiSAF, LiSGaF and LiCAF. They are excellent laser materials with high energy storage and high slope efficiency. They are also ideal working materials under conditions of ultra short pulse and ultra high power. Currently, Cr:LiSAF related products such as flashlight pumping and semi-conductor pumping laser have been widely used.
Physical Properties
| Chemical Formula | Cr3+:LiSrAlF6 |
| Lattice Parameters(Å) | a=5.084 |
| c=10.21 | |
| Crystal structure | trigonal |
| Space Group | P31c |
| Cr atoms/cm3 for 1% doping | 8.75x1019 |
| Fracture Toughness(Mpam) | 0.40( || c) |
| Melting Point (℃) | 766 |
| Density(g/ cm³) | 3.45 |
| Modulus of Elasticity(GPa) | 109 |
| Thermal Expansion | -10( || c) |
| Coefficient (106K) | 25(┴c) |
| Thermal Conductivity (W/m/K) | 3.3( || c) |
| 3.0(┴c) | |
| Specific Heat(J/gK) (@25℃) | 0.842 |
Optical Properties
| Emission Peak(nm) | 846 |
| Peak Stimulated Emission Cross Section(×10-20cm2) | 4.8( || c) |
| Spontaneous Fluorescence Lifetime(µs) | 67 |
| Scatter Losses(%/cm) | <0.2 |
| dn/dT(×10-6 ℃) | -4.8( || c) |
| -2.5(┴c) |
The Sellmeier equations(l in mm):
nc2 =1.98448+0.00235/(λ²-0.010936)-0.01057λ²
na2=1.97673+0.00309/(λ²-0.00935)-0.00828λ²
| Crystal | Wavelength(nm) | nc | na |
| Cr:LiSAF | 846 | 1.407 | 1.405 |
| 670 | 1.409 | 1.407 | |
| 423 | 1.413 | 1.412 | |
| 290 | 1.420 | 1.420 | |
| 266 | 1.422 | 1.424 |
Specifications of Cr:LiSAF
- Size: Rod sizes from 2mm to 16mm in diameter and from 1mm to 180mm in length
- Cr dopant concentrations: 0.5～1.0 mol%
- Parallelism: <10 arc seconds
- Perpendicularity: <5 arc minutes
- Chamfer: 0.13±0.07mm @ 45°
- Scratch/Dig code: 10/5 to MIL-PRF-13830B
- Flatness: λ/8 @ 632.8nm
- AR coating: R<0.10% @ 850nm
カタログ ダウンロード
- Cr:LiSAF レーザ結晶
221KB
CASTECH社の製品一覧へ戻る