YVO4
The yttrium orthvanadate (YVO4) is a positiveuniaxial 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 um):
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) |