ND:YVO4晶体
Nd:YAG相比Nd:YVO4对泵浦光有更大的受激发射截面和较高的吸收系数。它是一种性能优良的激光晶体，适合制造激光二极管泵浦，特别是中低功率的激光器。
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- 描述
描述
ND:YVO4晶体
与Nd:YAG相比Nd:YVO4对泵浦光有更大的受激发射截面和较高的吸收系数。它是一种性能优良的激光晶体，适合制造激光二极管泵浦，特别是中低功率的激光器。可以制成输出近红外、绿色、蓝色到紫外线等类型的全固态激光器。
产品特点
光损伤阈值低，高斜率效率
为双轴晶体输出为线偏振
低频泵浦波长，易于单模输出
受激发射截面大，泵浦波长线宽的吸收高
在808nm的泵浦宽带为Nd:YAG的5倍
在1064nm处的受激发射截面是Nd:YAG的3倍
产品应用
现在Nd:YVO4激光器已在机械、材料加工、波谱学、晶片检验、显示器、医学检测、激光印刷、数据存储等多个领域得到广泛的应用
规格
| Nd Dopant Level | 0.1 – 5.0 atm% |
| Standard Dimensions | 3x3x3 mm3, 3x3x1 mm3, 3x3x0.5 mm3 |
| Wavefront Distortion | λ/8@ 633nm |
| Scattering | Invisible, probed with a He-Ne laser |
| Orientation Tolerance | ±0.5deg |
| Dimensional Tolerance | ±0.1mm |
| End-faces Configuration | Plano/Plano |
| Surface Flatness | λ/10 at 633 nm |
| Surface Quality | 10/5 Scratch and Dig |
| Parallelism | < 10 arc seconds |
| Clear Aperture | > Central 90% |
| Intrinsic Loss | < 0.1%cm-1 |
物理属性
| Atomic Density | ~1.37×1020 atoms/cm3 |
| Crystal Structure | Zircon Tetragonal, space group D4h |
| a=b=7.12, c=6.29 | |
| Density | 4.22 g/cm3 |
| Mohs Hardness | Glass-like, ~5 |
| Thermal Expansion Coefficient | a=4.43×10-6/K, c=11.37×10-6/K |
光学属性(typically for 1.1 atm% Nd:YVO4, a-cut crystals)
| Lasing Wavelengths | 914nm, 1064 nm, 1342 nm |
| Thermal Optical Coefficient | dna/dT=8.5×10-6/K, dnc/dT=3.0×10-6/K |
| Stimulated Emission Cross-Section | 25.0×10-19cm2 @1064 nm |
| Fluorescent Lifetime | 90us @808 nm, (50us @808 nm for 2atm% Nd doped) |
| Absorption Coefficient | 31.4 cm-1@808 nm |
| Absorption Length | 0.32 mm @808 nm |
| Intrinsic Loss | Less than 0.1% cm-1@1064 nm |
| Gain Bandwidth | 0.96 nm (257 GHz) @1064 nm |
| Polarized Laser Emission | ppolarization, Parallel to optic axis (c-axis) |
| Diode Pumped Optical to Optical Efficiency | > 60% |
| Crystal Class | Positive uniaxial, no=na=nb, ne=nc, no=1.9573, ne=2.1652, @1064nm no=1.9721, ne=2.1858, @808nm no=2.0210, ne=2.2560, @532nm |
| Sellmeier Equation (for pure YVO4 crystals, λin um) | no2=3.77834+0.069736/(λ2-0.04724) – 0.0108133λ2ne2=4.59905+0.110534/(λ2-0.04813) – 0.0122676λ2 |
