Polarizing beam splitter

Polarizing Cube Beamsplitters split randomly polarized
beams into two orthogonal, linearly, polarized components-S-polarized
light is reflected at a 90deg. Angle while P-polarized light is transmitted.
Each beamsplitter consists of a pair of precision high tolerance right
angle prisms cemented together with a dielectric coating on the hypotenuse
of one of prisms.
Currently. as coating technologies and assembly techniques
have improved, so there are many types of polarizing beamsplitter
cubes can be provided in the market. Dayoptics has own technology
in providing two types of high precision polarizing beamsplitter cube.
One is by using cemented method for PBS (as standard PBS), the other
one is using optical bonding method for the interface of PBS (as high
power PBS). The comparison specification of two PBS as following for
your reference.

| Dayoptics |
Polarizing Beam Splitter (PBS) |
|
Standard PBS |
High Power PBS |
| interface surface |
Cemented |
Optically Bonded |
| Damaged threshold @ 1064 nm |
0.2-1 J/cm2 |
>15 J/cm2 |
| Possible damage threhold @ 355nm |
0.1-0.25 J/cm2 |
2-3J/cm2 |
| Flatness |
l/4 |
l/8 |
| Transmission @ 1064nm |
>95% |
>96% |
| Surface Figure |
60/40 |
40/20 (20/10) |
| extinction ratio |
300:1-500:1 |
>1000:1 |
