Nd:YVO4

Nd:YVO4

Yttrium vanadate has been growing in popularity 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. These advantages make Nd:YVO4 is a better choice than Nd:YAG for low-power devices such as hand-held pointers, and others compact lasers.

With advanced technology on growing and manufacturing high optical quality Nd:YVO4 crystals, FOCtek can provide a wide variety of finished crystals, our general Nd:YVO4 production capabilities include:

Capabilities Include:

1)

Nd dopant concentration:

0.1~3 atm% Tolerance within 10% of concentration

2)

Width x Height:

1*1~ 16*16mm

3)

Length:

0.02 ~ 20mm

 

Typical Specification and Tolerance:

1)

Orientation:

a-cut crystalline direction(+/-0.20)

2)

Dimensional tolerance:

+/-0.1mm(typical)High precision +/-0.005mm can be available upon request.

3)

Wavefront Distortion:

<l/8@633nm

4)

Surface quality:

better than 20/10 Scratch/Dig per MIL-O-1380A

5)

Parallelism:

< 10 arc seconds

6)

Perpendicularity:

< 5 arc minutes

7)

Surface flatness:

<l/10 at 632.8nm

8)

Clear aperture:

Central 95%

9)

Chamfer:

0.15x450

10)

Damage threshold:

over 15J/cm2 (rods without coating) over 700 MW/cm2 (coating)

11)

Coating:

(1) AR@1064nm, R< 0.1% (see coating 6-1)
(2) AR@1064nm, R< 0.1% & HT@808nm, T>95% (see coating 6-2)
(3) HR@1064nm, R>99.8% & HT@808nm, T>95%(see coating 6-3)
(4) HR@1064nm, R>99.8%, HR@532 nm, R>99% & HT@808 nm, T>95%(see coating 6-4)
(5) AR@1064 nm, R<0.1%, AR@532NM, R<0.3%(see coating 6-5)
 

 

picture

 

Peak Absorption Wavelength 808nm
Lasing Wavelength 914 nm, 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 dn/dT=8.5x10-6/K,dn/ dT=3.0x10-6/K
Stimulated Emission Cross-Section 25.0x10-19cm2 , @1064 nm
Fluorescent Lifetime Nd=1.2 atm% 90 μs @ 808 nm
   
                                       Nd=2.0 atm% 50 μs @ 808 nm
   
Absorption Coefficience Nd=1.1 atm% 31.4 cm-1 @ 808 nm
Absorption Length Nd=1.1 atm% 0.32 mm @ 808 nm
Intrinsic Loss Nd=1.1 atm% Less 0.1% cm-1 , @1064 nm
Gain Bandwidth 0.96 nm (257GHz)@1064nm
Polarized Laser Emission π polarization; parallel to optic axis (c-axis)
Diode Pumped Optical to Optical efficiency > 60%
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

 

Atomic Density ~1.37x1020 atoms/cm2
Crystal Structure Zircon Tetragonal. space group D4h, a=b=7.12, c=6.29
Density 4.22 g/cm2
Mohs Hardness Glass-like, ~5
Thermal Expansion Coefficient

αa=4.43x10-6 /K, αC=11.37x10-6/K

Thermal Conductivity Coefficient

║C:5.23 W/m/K; ┴ C: 5.10W/m/K


How to handle the Nd:YVO4 crystal
 

When you receive crystals from ANTYCO, please make sure that only qualified personnel are able to open inner packing at clean environment. Please prevent finger print, oil and other substances from adhering to the polished or coated surfaces.

If the surfaces are contaminated, please blow the surfaces with air ball. If there is still pollution on the crystal surfaces, please clean the surfaces with cleaning liquid and soft silk. The mixing liquid of 50% high purity alcohol and 50% high purity ether is recommended as cleaning liquid. Please notify that the contaminated surfaces are very easy to be damaged. When polished surfaces are fogged or damaged, please ask FOCTEK for repolishing and coating service.

Marks on the crystals
For general a-cut Nd:YVO4, there is a dot mark on the surface, which normal to the optical axis. And, if the coating is different on the input and output surface, there is an arrow mark on the cruystal side surface, which direct from input surface to output surface.

Standard Products Series 
ANTYCO, have a lot of standard series kits of diode pumped laser optics, is's easy to select what you need listed below

Part

Size

(mm)

Nd

Coatings

S1

S2

NYV001

3x3x1

0.5%

AR@1064nm, HT@808nm

AR@1064nm,

NYV002

3x3x1

1%

AR@1064nm, HT@808nm

AR@1064nm,

NYV003

3x3x1

1%

HR@1064nm, HT@808nm,

AR@1064nm,

NYV004

3x3x1

1%

HR@1064nm,HT@808nm,HR@532nm

AR@1064nm,

NYV005

3x3x3

0.5%

AR@1064nm, HT@808nm

AR@1064nm, HT@808nm

NYV006

3x3x3

0.5%

HR@1064nm, HT@808nm

AR@1064nm, HT@808nm

NYV007

3x3x5

0.5%

AR@1064nm, HT@808nm

AR@1064nm, HT@808nm

NYV008

3x3x8

0.5%

AR@1064nm, HT@808nm

AR@1064nm, HT@808nm

NYV009

3x3x12

0.5%

AR@1064nm, HT@808nm

AR@1064nm, HT@808nm

NYV010

3x3x3

1.0%

AR@1064nm, HT@808nm

AR@1064nm, HT@808nm

NYV011

3x3x3

1.0%

HR@1064nm, HT@808nm

AR@1064nm, HT@808nm

NYV101

3x3x0.5

3.0%

HR@1064nm, HR@532nm,HT@808nm

AR@1064nm&532 nm

NYV102

3x3x1

1.0%

HR@1064nm, HR@532nm,HT@808nm

AR@1064nm&532 nm

NYV103

3x3x1

2.0%

HR@1064nm, HR@532nm,HT@808nm

AR@1064nm&532 nm

NYV104

3x3x3

1.0%

HR@1064nm, HR@532nm,HT@808nm

AR@1064nm&532 nm

NYV105

3x3x5

0.5%

HR@1064nm, HR@532nm,HT@808nm

AR@1064nm&532 nm

NYV106

3x3x2

1.0%

HR@1064nm, HR@532nm,HT@808nm

AR@1064nm&532 nm

NYV107

3x3x2

0.5%

HR@1064nm, HR@532nm,HT@808nm

AR@1064nm&532 nm

ANTYCO, develop a new product series(Nd:YVO 4 +KTP) for very cmpact design of diode pumped green lasers. Nd:YVO 4 and KTP crystals are cemented together which is shown below.

picture

Nd:YVO 4 +KTP Cemented Series

Part# Nd:YVO4 Nd-3% KTP ( q =90°, f =23.5° ) Unit Price
Size(mm) Coatings: S1 Size Coating: S4
NKC001 1x1x0.5 HR@1064nm 
HT@808nm
1x1x2 HR@1064nm 
HT@532nm
$69
NKC002 2x2x0.5 2x2x2 $99
NKC003 1x1x0.5 HR@1064nm 
HR@532nm 
HT@808nm
1x1x2 $79
NKC004 2x2x0.5 2x2x2 $109

Notes: 
1) Coating specification: AR@1064nm, R<0.1%; HR@1064nm, R>99.8%; HR@ 532nm, R>98% 
HT@808nm, T>95%; 
2) The unit price listed above chart is for low quantity (1-10pcs), for high volume, please ask our sales for quantity discount.

Nd:YVO 4 properties compare with Nd:YAG

  Nd:YAG, 1 atm% Nd Nd:YVO 4 1 atm% Nd
Fluorescence lifetime ( t ) 230 m s 100 m s
Stimulated emission cross section ( s ) s 21=2.7-8.8x10-19cm-2 15.6x10-19cm-2( p -pol)
Absorption coefficient 7.1cm -1 31.2 cm -1
La 1.41mm 0.32mm
Threshold power 115mw 78mw
Converstion efficiency h s 38.6% 48.6%
Thermal conductivity coefficient ||c:14w/m/k 
^ c: 10.5w/m/k
||c:5.23w/m/k 
^ c: 5.10w/m/k
Highest dopant level 1.2% 3%
Crystals length for the same output power(<200mw) ~5mm (1%) ~0.5mm (3%) 
~1mm (1%)
Crystals length for the same output power(~2w) ~50(1%) 5mm(0.5%)
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