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Nd:YVO4

Nd:YVO4 is one of the most promising commercially available diode pumped solid state laser materials.

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.

Nd: YVO4 can produce IR green and blue laser by using minor different set-up. A broad absorption band centered at 808nm and favorable mechanical properties make Nd:YVO4 well suited for compact, efficient, high power diode-pumped lasers. Natural birefringence  gives rise to a highly polarized output at 1064.3 and 1342nm.


Featured

Low lasing threshold and high slope efficiency

Low dependency on pump wavelength

Large stimulated emission cross-section at lasing wavelength

High absorption over a wide pumping wavelength bandwidth


Optically uniaxial and large birefringence emits polarized laser


Laser Properties of Nd:YVO4 VS Nd:YAG

Laser crystal

Nd doped

Ó

a

τ

La

Pth

Effi.

(atm%)

(x10-19cm2)

(cm-1)

(µs)

(mm)

(mW)

( %)

Nd:YVO4(a-cut)

1.0

25

31.2

90

0.32

30

52

2

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

Stimulated emission cross-sections (σ)

Absorption Coefficient (α)

Fluorescent Lifetime (τ)

Absorption Length (La)

Threshold Power (Pth)

Pump Quantum Efficiency

Basic Properties

Atomic Density (Nd1.0%)

1.26 x1020 atoms/cm3

Crystal Structure 

Zircon Tetragonal, space group D4h

a=b=7.12, c=6.29

Density

4.22 g/cm3

Mohs Hardness

4-5(Glass-like)

Thermal Expansion Coefficient

a=4.43x10-6/K, c=11.37x10-6/K



Optical Properties

Lasing Wavelengths

914nm, 1064 nm, 1342 nm

Thermal Optical Coefficient

dna/dT=8.5x10-6/K, dnc/dT=3.0x10-6/K

Stimulated Emission Cross-Section

25.0x10-19cm2 @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

p polarization, Parallel to optic axis (c-axis)

Diode Pumped Optical to Optical Efficiency

> 60%

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




Specifications

Nd Dopant Level

0.1 - 3.0 atm%

Orientation Tolerance

A-cut/C-cut +/-0.5deg.

Dimensional Tolerance

±0.1mm

Surface Flatness

λ/[email protected]

Wavefront Distortion

λ/[email protected]

Surface Quality

10/5 Scratch and Dig

Parallelism

<10 arc seconds

Clear Aperture

>95%

Bevel/Chamfer

<[email protected]

Coating

AR/HR/PR coating upon customer’s request






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