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NdYVO4 crystal
型号：
LASERTEC'S NdYVO4 crystal
Lower lasing threshold and higher slope efficiency
Large stimulated emission cross-section at lasing wavelength
High absorption over a wide pumping wavelength bandwidth
Optically uniaxial and large birefringence emit strongly-polarized laser

    Nd:YVO4 is one of the most efficient laser host crystals for all-solid-state laser diode pumped lasers. Its large stimulated emission cross-section at lasing wavelength, high absorption coefficient and wide absorption bandwidth at pump wavelength, high laser induced damage threshold as well as good physical, optical and mechanical properties make it an excellent crystal for high power, stable and cost-effective diode pumped solid-state lasers With advanced technology on growing and manufacturing high optical quality Nd:YVO4 crystals, Lasertec can provide a wide variety of finished crystals.

Lasertec’s Specifications of Nd:YVO4 Crystal:

Nd+ Dopant

0.2%,0.27%,0.4%,0.5%,1%,2%

Orientation:

A-cut( ± 0.5° )

Dimension 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 of Nd:YVO4 Crystal:  

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 Efficiency

> 60%

Sellmeier Equation (for pure YVO4 crystals)

no2=3.77834+0.069736/(2 - 0.04724) - 0.01081332
no2=4.59905+0.110534/(2 - 0.04813) - 0.01226762 


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