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Zircon Tetragonal Laser Crystals 914nm ND Yvo4 Crystal Invisible Scattering

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Zircon Tetragonal Laser Crystals 914nm ND Yvo4 Crystal Invisible Scattering

Country/Region	china
City & Province	wuhan
Categories	Paint & Coatings

Product Details

Laser Crystal Nd:YVO4

Overview:

Nd:YVO4 crystal is one of the most efficient laser host crystal currently existing for diode laser pumped solid state 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 Nd:YVO4 an excellent crystal for high power, stable and cost effective diode pumped solid-state lasers.

General Specifications Of Nd:YVO4:

Nd Dopant Level	0.1-5.0atm%
Scattering	Invisible, probed with a He-Ne laser
Orientation Tolerance	±0.5deg
Dimensional Tolerance	±0.1mm
Surface Quality	10/5 Scratch and Dig
Clear Aperture	>90%
Surface Flatness	<λ/10@633nm
Wavefront Distortion	<λ/8@633nm
Parallelism	<10 arc seconds
End-faces Configuration	Plano/Plano
Intrinsic Loss	< 0.1%cm-1
Coating	AR1064&HT808: R<0.1%@1064nm, R<5%@808nm HR1064&HT808&HR532: R>99.8%@1064nm, R<5%@808nm, r="">99%@532nm AR1064: R<0.1%@1064nm

Physical Properties of Nd:YVO4:

Atomic Density	~1.37x10²⁰ 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=4.43x10^-6/K, c=11.37x10^-6/K

Optical Properties of Nd:YVO4 (typically for 1.1 atm% Nd:YVO4, a-cut crystals)

Lasing Wavelengths	914nm, 1064nm, 1342nm
Thermal Optical Coefficient	dna/dT=8.5x10^-6/K, dnc/dT=3.0x10^-6/K
Stimulated Emission Cross-Section	25.0x10^-19cm²@1064nm
Fluorescent Lifetime	90us @808nm, (50us @808 nm for 2atm% Nd doped)
Absorption Coefficient	31.4 cm^-1@808nm
Absorption Length	0.32 mm @808nm
Intrinsic Loss	Less than 0.1% cm^-1@1064nm
Gain Bandwidth	0.96 nm (257 GHz) @1064nm
Polarized Laser Emission	p polarization, 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, λ in um)	no²=3.77834+0.069736/(λ²-0.04724)-0.0108133λ² ne²=4.59905+0.110534/(λ²-0.04813)-0.0122676λ²

Laser Properties (Nd:YVO4 VS Nd:YAG):

Laser Crystal	Nd doped	σ	α	τ	La	Pth	η
Laser Crystal	(atm%)	(x10^-19cm²)	(cm^-1)	(cm^-1)	(mm)	(mW)	( %)
Nd:YVO4(a-cut)	1.1	25	31.2	90	0.32	78	48.6
Nd:YVO4(a-cut)	2	25	72.4	50	0.14	78	48.6
Nd:YVO4(c-cut)	1.1	7	9.2	90		231	45.5
Nd:YAG	0.85	6	7.1	230	1.41	115	38.6