掺钕钒酸钇(Nd:YVO4)

 

掺钕钒酸钇(Nd:YVO4)晶体是一种性能优良的激光晶体,适于制造激光二极管泵浦特别是中低功率的激光器。与Nd:YAG相比Nd:YVO4对泵浦光有较高的吸收系数和更大的受激发射截面。激光二极管泵浦的Nd:YVO4晶体与LBO,BBO,KTP等高非线性系数的晶体配合使用,能够达到较好的倍频转换效率,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。现在Nd:YVO4激光器已在多个领域得到广泛的应用。而且Nd:YVO4二极管泵浦固态激光器正在迅速取代传统的水冷离子激光器和灯泵浦激光器的市场,尤其是在小型化和单纵模输出方面。

Capabilities:

Nd dopant:
0.27%, 0.3%, 0.4%, 0.5%, 0.7%, 1.0%, 2.0%, 3.0%
Width x Height:
1x1 ~ 16x16mm
Length:
0.02 ~ 20mm

Specifications:

Orientation:
a-cut( ± 0.5° )
Dimensional Tolerance:
+/-0.1mm
Wavefront Distortion:
<λ/8 at 633nm
Surface Quality:
20/10
Parallelism:
< 10 arc seconds
Perpendicularity:
< 5 arc minutes
Surface Flatness:
<λ/10 at 632.8nm
Clear Aperture:
Central 95%
Chamfer:
0.15x45°
Coating:
1.AR@1064nm R<0.1%
2.AR@1064nm R< 0.1% & HT@808nm T>95%
3.HR@1064nm R>99.8% & HR@532nm R>99% & HT@808nm T>95%

Properties: 

Atomic Density
~1.37x1020 atoms/cm2
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
aa=4.43x10-6/K, ac=11.37x10-6/K
Thermal Conductivity Coefficient
||C: 5.23 W/m/K; ^C: 5.10 W/m/K
Lasing Wavelengths
914nm, 1064 nm, 1342 nm
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
Thermal Optical Coefficient
dna/dT=8.5x10-6/K, dnc/dT=3.0x10-6/K
Stimulated Emission Cross-Section
25.0x10-19 cm2 , @1064 nm
Fluorescent Lifetime
90 ms (about 50 ms for 2 atm% Nd doped) @ 808 nm
Absorption Coefficient
31.4 cm-1 @ 808 nm
Absorption Length
0.32 mm @ 808 nm
Intrinsic Loss
Less 0.1% cm-1 , @1064 nm
Gain Bandwidth
0.96 nm (257 GHz) @ 1064 nm
Polarized Laser Emission
p parallel to optic axis (c-axis)
Diode Pumped Optical to Optical fficiency
> 60%

Sellmeier Equation (for pure YVO4 crystals)
no2=3.77834+0.069736/(l2 - 0.04724) - 0.0108133l2
no2=4.59905+0.110534/(l2 - 0.04813) - 0.0122676l2

 

Note: Kinds of sizes, coating are available upon request.


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