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.

Capabilities Include:

1)	Nd dopant concentration:	0.1~3 atm% Tolerance within 10% of concentration
2)	Width x Height:	11~ 1616mm
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)

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	α_a=4.43x10^-6 /K, α_C=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 FOCTEK, 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
Foctek 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
Part	Size (mm)	Nd	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

Nd:GdVO4 Nd:YAG

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