Glan-type polarizers
Main features
- Substrate material: α-BBO, calcite and YVO4
- Extremelly high extinction ratio over a wide wavelength range
- Air-spaced configuration
- Minor transmitted beam displacement and deviation
- Single MgF2 coating layer on every optical face for optimized broadband transmission
- Customization available upon request
Application examples
- Optical isolation
- Polarization separation
- Polarization cleaning
- Laser power attenuation
- Description
- Drawing
- Standard specifications
4Lasers provide air-spaced Glan-Taylor and Glan-laser type polarizers fabricated from α -BBO (UV), calcite (VIS to NIR), YVO4 (VIS to Mid-IR) birefringent crystalline material and mounted in barrel-type black anodized aluminum mount. Glan-type polarizers are constructed to transmit only extra-ordinary polarized beam, while ordinary polarized beam is deflected. These polarizers feature extremelly high extinction ratio over wide wavelength range and their common applications include polarization separation, polarization cleaning, power attenuation. Glan-Taylor polarizers are designed to be used for low and mid-power applications, while Glan-Lasers – for high-power regime due to higher damage threshold and escape window in housing for deflected ordinary polarized beam. Single MgF2 layer are applied onto Glan-type polarizer optical surfaces in order to noticeably maximize broadband transmission.
| Glan-type polarizers | |
|---|---|
| Extinction ratio (transmitted beam) | α -BBO and YVO4 polarizers: <5x10-6 Calcite polarizers: <5 × 10-5 |
| Beam deviation | <3 arcmin |
| Length tolerance | ±0,1 mm |
| Parallelism error | <1 arcmin |
| Surface quality | 20-10 S-D |
| Surface flatness | <λ/[email protected] nm |
| Coatings | Single MgF2 layer |
| LIDT | Glan-Taylor polarizers: >200 MW/cm2 @1064 nm, 10 ns Glan-laser polarizers: >500 MW/cm2 @1064 nm, 10 ns |
| Mount | Black anodized aluminum barrel-type mount |
