Introduction
The yttrium orthvanadate (YVO4)
is a positive uniaxial crystal grown with Czochralski
method. It has good temperature stability and physical and
mechanical properties, wide transparency and large birefringence,
so it is also ideal for optical components such as fiber
optical isolators and circulators, beam displaces and other
polarizing optics, etc.
Basic Properties:
Please view Birefringent Physical Properties (PDF Format)
|
0.6341
mm |
1.30
mm |
1.55
mm |
Refractive Indices: |
no |
1. 9929
|
1.950
|
1.9447
|
ne |
2.2154 |
2.1554 |
2.1486 |
Birefringence
(Dn
= ne - no) |
0.2225, |
0.2054 |
0.2039 |
Walk-off
Angle at 45º (r) |
6.04º
at |
5.72º |
5.69º |
Sellmeier Equation (l in mm):
no2=3.77834
+ 0.069736/(l2 - 0.04724) - 0.0108133l2
ne2=4.59905
+ 0.110534/(l2 - 0.04813) - 0.0122676l2
Applications of YVO4 Crystals:
Following drawings are the simple demonstrations
of how the YVO4 crystals are used in Fiber Optic
Isolator,
Beam Displacers, Circulators and interleaver.
Specifications
Dimension tolerance |
(W ± 0.1 mm) x (H ± 0.1 mm) xL( 0.05mm) |
Transmitting wavefront distortion: |
l/8 @ 633 nm |
Clear aperture: |
> 90% central area |
Flatness: |
l/8 @ 633 nm |
Scratch/Dig code: |
10/5 to MIL-O-13830A |
Parallelism: |
better than 10 arc seconds |
Perpendicularity: |
5 arc minutes |
Angle tolerance: |
Dq < ±0.5°, Df < ± 0.5° |
AR coating: |
R< 0.2% at 1550nm |
Wedge Angle tolerance: |
0.1°(wedges) |
|