Descriptions:
Yttrium
Orthovanadate (YVO4) is ideal for optical polarizing components and in many applications
including fiber optic isolators and circulators, interleavers, beam displacers
and other polarizing optics.
Main
applications:
1)
Fiber-optic isolators
2)
Beam displacers.
3)
optical circulators
Comparison of basic properties betweenYVO4 and Other
Birefringent Crystals.
|
|
YVO4
|
TiO2
|
CaCO3
|
LiNbO3
|
|
Thermal Expansion (/℃)
|
c-axis
|
11.4x10-6
|
9.2x10-6
|
26.3x10-6
|
16.7x10-6
|
|
a-axis
|
4.4x10-6
|
7.1x10-6
|
5.4x10-6
|
7x10-6
|
|
Refractive Index
|
no
|
1.9447@1550nm
|
2.454@1530nm
|
1.6346@1497nm
|
2.2151@1440nm
|
|
ne
|
2.1486@1550nm
|
2.710@1530nm
|
1.4774@1497nm
|
2.1413@1440nm
|
|
Birefringence(ne-no)
|
0.2039@1550nm
|
0.256@1530nm
|
-0.1572@1497nm
|
-0.0738@1440nm
|
|
Mohs Hardness
|
5
|
6.5
|
3
|
5
|
|
Deliquescence
|
None
|
None
|
Weak
|
None
|
|
Transparency range
|
0.4-5μm
|
0.4-5μm
|
0.35-2.3μm
|
0.4-5μm
|
Basice properties
of YVO4 crystal:
|
Transparency Range
|
High transmittance from 0.4 to 5μm
|
|
Crystal Symmetry
|
Zircon Tetragonal, space group D4h
|
|
Crystal Cell
|
a=b=7.12Å，c=6.29Å
|
|
Density
|
4.22g/cm3
|
|
Mohs Hardness
|
5
|
|
Hygroscopic Susceptibility
|
Non-hygroscopic
|
|
Thermal Expansion Coefficient
|
αa = 4.43×10-6/K；αc = 11.37 ×10-6/K
|
|
Thermal Conductivity Coefficient
|
//C: 5.23 W/m/K； ⊥C: 5.10 W/m/K
|
|
Thermal Optical Coefficient
|
dna/dT = 8.5×10-6/K；dnc/dT = 3.0×10-6/K
|
|
Crystal Class
|
Positive uniaxial with no=na=nb, ne=nc
|
|
Refractive Indices, Birefringence
(Δn = ne- no)
and Walk-off Angle @ 45° (ρ)
|
no = 1.9929, ne = 2.2154, Δn = 0.2225, ρ=
6.04° at 630nm
no = 1.9500, ne = 2.1554, Δn = 0.2054, ρ=
5.72° at 1300nm
no = 1.9447, ne = 2.1486, Δn = 0.2039, ρ=
5.69° at 1550nm
|
|
Sellmeier Equation（λ in μm）
|
no2 = 3.77834 + 0.069736/(λ2 - 0.04724)
- 0.0108133λ2
ne2 = 4.59905 + 0.110534/(λ2- 0.04813) -
0.0122676λ2
|
|
|
|
|
HGO offers
NdYVO4 specifications:
|
Dimension Tolerance
|
±0.1mm
|
|
Flatness
|
λ/10 @ 632.8nm
|
|
Wavefront distortion
|
λ/4@ 632.8nm
|
|
Surface Quality
|
10/5 per MIL-O-13830B
|
|
Parallelism
|
10″
|
|
Perpendicularity
|
10′
|
|
Bevel/Chamfer
|
<0.1mm@45deg.
|
|
Chips
|
<0.1mm
|
|
Clear Aperture
|
>95%
|
|
Coating
|
AR/HR (IAD, EB, IBS) coating upon
customer’s request
|
|
Damage Threshold
|
750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz
|
|
Quality Warranty Period
|
One year
under proper use
|
Why
Choose HGO ?
HG
OPTRONICS.,INC. has the ability to grow high purity YVO4 ( Un-doped
Yttrium Orthovanadate) crystals. High quality of starting material is used for
crystal growth and strict quality control is applied to our YVO4 absorption
,scattering loss, bulk loss , inclusions and all the other required processing
specs which assures that each crystal from HGO will comply with customer’s specification and perform well in laser system. HGO has
now completed a mass-production line and have strong ability to supply such crystals
with large quantity in short time.
What is more, based on our advanced
diffusion bonding technology, diffusion bonding composites of NdYVO4 and YVO4 are
extremely useful and very popular for higher power Nd doped vanade based laser
systems. High quality of diffusion bonding crystals NdYVO4 with YVO4 endcap are
available from stock and also customization.
