Description
- Origin: CN(Origin)
- Function: laser crystal
- Size: 5*85mm
- Model Number: BM-YR-002
- Material: Other
- color: Pink
- quality: High optical quality
- characteristic: Anti ultraviolet radiation characteristics
- performance: High efficiency, low threshold
- thermal stability: Good thermal stability
- rate: Good repetition rate
Nd: YAG crystal is currently the best solid-state laser material with high gain, low threshold, high efficiency, low loss, good thermal conductivity and thermal shock resistance. It is suitable for a variety of laser operation modes (continuous, pulse, Q-switch, mode locking, frequency doubling, etc.), and is widely used in industry, medical and scientific research fields
Technical Indicators
|
Doping concentration |
Nd: 0.2～1.3at% |
|
Crystalline orientation |
[111]or[100]，deviation5°within |
|
Wavefront distortion |
See the table below for details. |
|
extinction ratio |
See the table below for details. |
|
Crystal rod size |
diameter:2～15 mm, length:3～200 mm |
|
Dimensional tolerance |
diameter:+0.00/-0.05mm, length:±0.5mm |
|
Cylindrical Processing |
400#Abrasive finishing or polishing |
|
End-face parallelism |
≤ 10" |
|
Verticality between end face and rod axis |
≤ 5′ |
|
End flatness |
λ/10 @632.8nm |
|
surface quality |
10-5 (MIL-O-13830A) |
|
Inverted side |
0.15±0.05mm |
|
Reflectivity of antireflective film |
≤ 0.25% @1064nm |
|
Laser Damage Threshold of Coatings |
≥500MW/cm2 |
Extinction ratio and wavefront distortion of crystal rods are shown in the table below.：
|
Diameter of crystal rod |
Optical homogeneity |
Standard level |
Optimum Level |
|
Ф3~Ф5mm |
Wavefront distortion |
≤0.25λ/25mm |
≤0.063λ//25mm |
|
extinction ratio |
≥25dB |
≥28dB |
|
Ф6~Ф8mm |
Wavefront distortion |
≤0.35λ/25mm |
≤0.1λ//25mm |
|
extinction ratio |
≥22dB |
≥25dB |
|
|
Ф9~Ф12mm |
Wavefront distortion |
≤0.5λ/25mm |
≤0.125λ//25mm |
|
extinction ratio |
≥20dB |
≥23dB |
|
|
Ф13~Ф15mm |
Wavefront distortion |
≤0.6λ/25mm |
≤0.25λ//25mm |
|
extinction ratio |
≥18dB |
≥20dB |
Optical and spectral properties
|
Laser Transition |
4F3/2 → 4I11/2 |
|
Laser Wavelength |
1064nm |
|
Photon energy |
1.86×10-19J@1064nm |
|
Emission linewidth |
4.5Å @1064nm |
|
Launch cross section |
2.7~8.8×10-19cm2@1at% Nd |
|
fluorescence lifetime |
230μs@1at% Nd |
|
Diode Pumped Absorption Wavelength |
808nm |
|
Pump Absorption Bandwidth |
1nm |
|
Main Pumping Zone Range |
400~850nm |
|
Refractive index |
1.8197@1064nm |
Physical and chemical properties
|
crystal structure |
Cubic system |
|
lattice constant |
12.01 Å |
|
melting point |
1970℃ |
|
Mohs hardness |
8.5 |
|
density |
4.56±0.04g/cm3 |
|
specific heat |
0.59J/g.cm3@0-20℃ |
|
Modulus of elasticity |
310GPa |
|
Young's modulus |
3.17×104Kg/mm2 |
|
Poisson ratio |
0.3 |
|
Tensile strength |
0.13~0.26GPa |
|
thermal expansion coefficient |
[100]direction:8.2×10-6/℃@ 0~250℃ |
|
[110]direction:7.7×10-6/℃@0~250℃ |
|
|
[111]direction:7.8×10-6/℃@0~250℃ |
|
|
Thermal conductivity |
14W/m/K@20℃ |
|
10.5W/m/K@100℃ |
|
|
Thermo-optical coefficient(dn/dT) |
7.3×10-6/℃ |
|
Thermal shock resistance |
790W/m |
|
solubility |
Insoluble in water，Slightly soluble in ordinary |
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