Nd:YVO4 Laser Crystal

Neodymium doped Gadolinium Vanadate(Nd: YVO4) has become popular host crystal for diode pumping among the current commercial laser crystals because of its high gain, low threshold and high absorption coefficients at pumping wavelengths, which result from the excellent fit of the neodymium dopant in the crystal lattice. This is mainly for Nd:YVO4’s absorption and emission features surpassing Nd:YAG Pumped by laser diodes. Nd:YVO4 crystal has been incorporated with high NLO coefficient crystals (LBO, BBO or KTP) to frequency-shift the output from the near infrared to green, blue, or even UV.
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Advantages

1 ) High absorption over a wide pumping wavelength bandwidth

2 ) Larger stimulated emission cross-section at the lasing wavelength of 1064nm

3 ) Lower lasing threshold and higher slope efficiency

4 ) As a uniaxial crystal with a large birefringence, the emission is only a linearly polarized

Specifications

Material

Nd:YVO4

Dopant Concentration

0.1 – 3at%

Orientation

A-cut or C-cut

Dimension Tolerance

W(+/-0.1)×H(+/-0.1)×L(+/-0.5)mm

Wavefront Distortion

<λ/8 @633nm

Chamfer

<0.15×45°

Clear Aperture

>90%

Flatness

λ/10@ 633 nm

Chips

<0.1mm

Scratch/Dig

10-5@MIL-0-13830A

Perpendicularity 

≤5 arc minutes

Parallelism

 <20 arc seconds

Damage Threshold

1GW/cm2@1064nm 10ns 10HZ

Anti-Reflection Coating

R<0.2%@1064nm

Properties

Crystal Structure

Tetragonal System

Point Group

D4h

Density

4.22 g/cm2

Mohs Hardness

4-5

Thermal Expansion Coefficient

αa=4.43×10-6/K   αc=11.37×10-6/K

Thermal Conductivity Coefficient

⊥C: 51mw/cm.k //C: 52.3 mw /cm.k(300k)

Laser Wavelength

1064nm, 1342nm

Pump Wavelength

808nm

Stimulated Emission Cross-Section

25×10-19cm2 @ 1064nm

Fluorescent Lifetime

90μs(1% Nd doping)

Absorption Coefficient

31.4cm-1 @810nm

Intrinsic Loss

0.02cm-1 @1064nm

Gain Bandwidth

0.96nm@1064nm

Polarized Laser Emission

p polarization; parallel to optic axis(c-axis)