Thorlabs' High-Power Broadband Polarizing Beamsplitters are ideal for both Ti:sapphire and ytterbium (Yb) femtosecond lasers, as well as other broad bandwidth or tunable laser sources. The beamsplitters are designed for use over a wavelength range of 355 - 532 nm, 720 - 1080 nm, or 900 - 1300 nm.
- High Extinction Ratio Up to 100 000:1
- Broadband Operation with Options from 355 to 1300 nm
- High Damage Threshold
- Alternative to Crystalline-Based Polarizers
The input/output faces of the beamsplitters are AR-coated, to minimize reflectance over their respective wavelength ranges. The beamsplitters separate the s- and p-polarization components of the incident laser by reflecting the s-component at the dielectric beamsplitter coating, while allowing the p-component to transmit through.
Figure: For hexagonal broadband polarizing beamsplitters, the symmetric hexagonal design allows for use of all 4 entrance/exit ports, like the more common polarizing beamsplitter cubes.
The beamsplitter interface uses an epoxy-free, optical contact bond, which minimizes absorption and scattering loss allowing for high damage thresholds. The internal mating surfaces are precision polished to the flatness and smoothness required for optical contacting and then joined without any adhesive. As a result of this optical contact bond, Thorlabs is able to manufacture compact, thermally stable beamsplitters with high transmission and minimal beam displacement.
Figure: The hexagonal polarizing beamsplitter separates an unpolarized beam incident from the left into the transmitted p-polarization and reflected s-polarization. The beamsplitter can also be used in the reverse directions.
Thorlabs offers a variety of mounting solutions, including both compact platform mounts and kinematic platform mounts. Please note that, due to the unique geometries of Thorlabs' broadband polarizing beamsplitters, certain compact mounts designed for our beamsplitter cubes will not properly fit these designs. When mounting, care should be taken to keep from applying unnecessary stress on the polarizer, which can reduce the attainable extinction ratio by creating stress-induced birefringence inside the polarizer.
Features
- Hexagonal Design for Bi-directional Operation
- Broadband Wavelength Ranges
- 355 - 532 nm, 720 - 1080 nm, or 900 - 1300 nm
- High Extinction Ratio
- High Power Handling
- Low Group Delay Dispersion
- Epoxy-Free Optical Contact at Beamsplitter Interface Minimizes Absorption and Scattering Losses
| Table 1.1 Key Specifications | ||||
|---|---|---|---|---|
| Item # | UFPBSxx6 | UFPBS10A | UFPBSxx3 | |
| Design Wavelength | 355 - 532 nm | 720 - 1080 nm | 900 - 1300 nm | |
| Extinction Ratioa | Tp:Ts > 5000:1 (355 - 532 nm) Tp:Ts > 100 000:1 (390 - 460 nm) |
Tp:Ts > 1000:1 (720 - 1080 nm) Tp:Ts > 10 000:1 (730 - 1060 nm) Tp:Ts > 100 000:1 (800 - 900 nm) |
Tp:Ts > 1000:1 (900 - 1300 nm) Tp:Ts > 10 000:1 (900 - 1250 nm) Tp:Ts > 100 000:1 (980 - 1080 nm) |
|
| Reflected Beam Deviation | 63.8° ± 5 arcmin | 66.3° ± 5 arcmin | 67.5° ± 5 arcmin | |
| Group Delay Dispersionb | |GDDp,s| < 40 fs2 | |GDDp,s| < 40 fs2 | |GDDp,s| < 30 fs2 | |