厂商 ：济南智和弘盛光电有限公司
山东 济南- 主营产品：
- DKDP电光开关
- Nd:YAG
- KTP
Nd:YAG is the earliest and most well-known laser host crystal. Since it combines obvious advantages in basic properties of laser crystal, Nd:YAG has ubiquitous presence in near-infrared solid-state lasers and their frequency-doubler, tripler, and higher order multiplier.
Basic Properties of Nd:YAG Crystal
|
Crystal Structure |
Cubic |
|
Lattice Constant |
12.01 ? |
|
Melting Point |
1970 °C |
|
Density |
4.5 g·cm-3 |
|
Reflective Index |
1.82 |
|
Thermal Expansion Coefficient |
7.8×10-6 /K <111> |
|
Thermal Conductivity (W/m/K) |
14 @20°C 10.5 @100°C |
|
Mohs Hardness |
8.5 |
|
Stimulated Emission Cross-section |
2.8×10-19 cm-2 |
|
Relaxation Time of Terminal Lasing Level |
30 ns |
|
Radiative Lifetime |
550 μs |
|
Spontaneous Fluorescence |
230 μs |
|
Line width |
0.6 nm |
|
Loss Coefficient |
0.003 cm-1 @1064nm |
THATSHIGH Specifications for Nd:YAG Crystal
|
Dimension |
Maximum length 200mm with tolerance ±0.5mm |
|
|
Maximum diameter 20mm with tolerance ±0.05mm |
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|
Doping Concentration Nd |
0.3~1.0 (±0.1) atm% |
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|
Chamfer |
0.1mm @45? |
|
|
Wavefront Distortion |
λ/8 @633nm |
|
|
Damage Threshold |
>750MW/cm2 |
|
|
Flatness |
λ/10 @633nm |
|
|
Parallelism |
< 10" |
|
|
Perpendicularity |
≤5′ |
|
|
Surface Quality [S/D] |
10/5 |
|
|
Coating |
HR |
R>99.8% @1064nm R<5% @808nm |
|
AR |
R<0.15% @1064nm |
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|
Other HR coatings, e.g. HR@1064nm & 532nm, 946nm, 1319nm etc. are also available |
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THATSHIGH Quality Standard of Nd:YAG Crystal
|
Diameter (mm) |
Standard Grad |
Excellence Grade |
Super Excellence Grade |
|
φ3~6.35 |
≤ 0.5 fringes/ inch |
≤ 0.25 fringes/ inch |
≤ 0.1 fringes/ inch |
|
≥ 25 dB |
≥ 28 dB |
≥ 30 dB |
|
|
φ7~10 |
≤ 0.7 fringes/ inch |
≤ 0.4 fringes/ inch |
≤ 0.16 fringes/ inch |
|
≥ 22 dB |
≥ 25 dB |
≥ 28 dB |
|
|
φ11~13 |
≤ 1 fringes/ inch |
≤ 0.6 fringes/ inch |
≤ 0.2 fringes/ inch |
|
≥ 20 dB |
≥ 23 dB |
≥ 26 dB |
|
|
φ14~16 |
≤ 1.2 fringes/inch |
≤ 0.8 fringes/inch |
≤ 0.25 fringes/inch |
|
≥ 18 dB |
≥ 20 dB |
≥ 23 dB |
Note: Nd:YAG rods for 946 nm or 1319 nm lasers, and higher grade or specific Nd:YAG rods or slabs can be provided. Er:YAG, Yb:YAG and other ion doped YAG crystals are also available upon request.
