| With the fast development of fiber-optic communication and polarization optics, a variety of polarizers are now playing more and more important roles in different applications ,especially are widely used in optical components which are composed of many polarization optics. U-optics provides customized polarizers made of four materials such as ¦Á-BBO,Calcite,Quartz and YVO4 for wide spectrum and high polarization applications. |
Comparison of the Four Materials
YVO4 |
Calcite |
¦Á-BBO |
Quartz |
|
Transparency |
500-4000nm |
350-2200nm |
200-3500nm |
200-2300nm |
Crystal Class |
Positive no=na=nb,ne=nc |
Negative no=na=nb,ne=nc |
Negative no=na=nb,ne=nc |
Positive no=na=nb,ne=nc |
Mohs Hardness |
5 |
3 |
4.5 |
7 |
Thermal Expansion Coefficient |
¦Áa=4.43x10-6/K ¦Ác=11.37x10-6/K |
¦Áa=24.39x10-6/K ¦Ác=5.68x10-6/K |
¦Áa=4x10-6/K ¦Ác=36x10-6/K |
¦Áa=6.2x10-6/K ¦Ác=10.7x10-6/K |
Hygroscopic Susceptibility |
Low |
Low |
Low |
Low |
Main Polarizer Products
| Polarizer | Material | Illustration |
Properties and Application |
| Glan-Taylor Polarizer | ¦Á-BBO, Calcite YVO4 |
 |
Air-spaced Close to Brewster's Angle cutting Low L/A=0.8 Mounted without escape windows For low to medium power application |
| Glan-Laser Polarizer | ¦Á-BBO, Calcite YVO4 |
 |
Air-spaced Close to Brewster's Angle cutting Mounted with double escape windows Suitable for high power applications L/A=1.5 |
| Glan-Thompson Polarizer | ¦Á-BBO, Calcite |
 |
Cemented Suitable for low power applications Wide acceptance angle |
| Wollaston Polarizer | ¦Á-BBO, Calcite YVO4 Quartz |
 |
Cemented Separate ordinary and extraordinary beams at certain angle Suitable for low power application and where the large deviation is required |
| Rochon Polarizer | ¦Á-BBO, YVO4 Quartz |
 |
¦Á-BBO is used to guarantee a wide transmission range Especially ,suitable for UV application Split the ordinary and extraordinary ray, But only ordinary beam is deviated |
| Polarization Beamsplitter | BK7 Grade A Fused Silica |
 |
Split the ordinary and extraordinary ray |