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Introduction  

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

4 Low lasing threshold and high slope efficiency
4 Large stimulated emission cross-section at lasing wavelength
4 High absorption over a wide pumping wavelength bandwidth
4 Optically uniaxial and large birefringence emits polarized laser
4 Low dependency on pumping wavelength and tend to single mode output

         

CRYSTECH massively produces and provides high quality Nd:YVO4 crystals at competitive prices.

Basic Properties:

Atomic Density:

1.26x1020 atoms/cm3 (Nd 1.0%)

Crystal Structure:

Zircon Tetragonal, space group D4h-I4/amd
a=b=7.1193, c=6.2892

Density:

4.22g/cm3

Mohs Hardness:

4-5 (Glass-like)

Thermal Expansion Coefficient (300K):

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

Thermal Conductivity Coefficient (300K):

//C: 0.0523W/cm/K
^ C: 0.0510W/cm/ K

 Optical Properties:

  Lasing wavelength:   1064nm, 1342nm
  Thermal optical coefficient (300K):   dno/dT=8.5x 10-6/K
  dne/dT=2.9x 10-6/K
  Sellmeier Equation  
  (for pure YVO4 crystals):
  no2=3.77834+0.069736/(l2-0.04724)-0.0108133.l2
  ne2=4.59905+0.110534/(l2-0.04813)-0.0122676.l2
  Stimulated emission cross-section:   25x 10-19cm2 @1064nm
  Fluorescent lifetime:   90m s
  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)
  Diode pumped optical to optical efficiency:   >60%

 Laser Properties:

The Nd:YVO4 crystal has large stimulated emission cross-sections at both 1064nm and 1342nm. The stimulated emission cross-section of an a-axis cut Nd:YVO4 crystal at 1064nm is about 4 times higher than that of the Nd:YAG crystal. Although the lifetime of Nd:YVO4 is about 2.7 times shorter than that of Nd:YAG. Because of its high pump quantum efficiency, the slope efficiency of Nd:YVO4 can be very high if the laser cavity is properly designed. Table 1 lists the major laser properties of Nd:YVO4 in comparison with those of Nd:YAG.

Table 1. Laser Properties of Nd:YVO4

Laser crystal Doping(atm%) s(x10-19cm2) a (cm-1) t (ms) la (mm) Pth(mW) h s(%)
Nd:YVO4(a-cut) 1.0
2.0
25
25
31.2
72.4
90
50
0.32
0.14
30
78
52
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

Diode pumped Nd:YVO4 laser output comparing with diode pumped Nd:YAG laser.

Crystals Size (mm3) Pump Power Output (at 1064nm)
Nd:YVO4 3x3x1 850mW 350mW
Nd:YVO4 3x3x5 15W 6W
Nd:YAG 3x3x2 850mW 34mW


Nd YVO4's Specification:

Nd: Dopant Level

0.1 - 3.0 atm%

Wavefront Distortion

< l/8 at 633 nm

Scattering Sites

invisible, probed with a He-Ne laser

Orientation

0.5deg.

Dimensional Tolerance

0.1mm

End-faces Configuration

Plano/Plano

Surface quality

10/5 Scratch/Dig per MIL-O-13830B

Flatness

l/10 at 633 nm

Clear Aperture

> Central 90%

Parallelism

< 10 arc sec.

Intrinsic Loss

< 0.1% cm-1

Standard Products

Part No. Doping Dimension Coating

NYV2301

2%

3x3x1mm

HR/AR Coating

NYV2302

2%

3x3x1mm

AR/AR Coating

NYV1301

1%

3x3x1mm

HR/AR Coating

NYV1305

1%

3x3x5mm

AR/AR Coating

NYV5310

0.5%

3x3x10mm

AR/AR Coating

NYV7408 0.27% 4x4x8mm

AR/AR Coating

AR/AR: S1:AR@1064(R<0.1%)&532nm(R<0.5%) HT@808nm(R<5%); S2:AR@1064&532nm
HR/AR: S1:HR@1064(R>99.8%)&532nm(R>99%)
HT@808nm(R<5%); S2:AR@1064&532nm

Note: Other specifications of Nd:YVO4 crystals and coatings are also available upon request.

DPM Crystal for Green Laser Pointer

 

Nd:YVO4+KTP for Green Laser Pointer

The most outstanding advantage of DPSS laser is its compact package, especially for Green Laser Pointer. CRYSTECH supply which combine Nd:YVO4 crystal with KTP crystal, resulting in efficient, ultra-compact, diode pumped laser devices emitting the green laser. It greatly reduces your material cost and enhances assembling efficiency.

• Diode pumped Nd:YVO4+KTP green laser point

Nd:YVO4 (mm3)

KTP (mm3)

Pump Power

Output

2x2x1

2x2x3

150mW

>1mW

3x3x1

3x3x5

500mW

>20mW

Coating: S1: R>99.8% @1064 nm, R<5% @808 nm;S2: R>99.8% @1064 nm, R<5% @532 nm

Standard Products

Part No.

Nd:YVO4

KTP

PDM01

2x2x1

2x2x3mm

PDM02

2x2x1

2x2x5mm

PDM03

3x3x1

3x3x5mm

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If you don't find what you're looking for, Contact Us. We may have a suitable product that's not listed, or we may be able to develop a material to fit your specific needs. Tel : (02)2755-1524 / Fax : (02)2704-4070
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