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

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
Crystal Structure	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