Glan-type polarizers
Main features
- Substrate material: α-BBO, calcite, and YVO4
- Extremely 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 a barrel-type black anodized aluminum mount. Glan-type polarizers are constructed to transmit only the extra-ordinary polarized beam, while the ordinary polarized beam is deflected. These polarizers feature an extremely high extinction ratio over a wide wavelength range and their common applications include polarization separation, polarization cleaning, power attenuation. Glan-Taylor polarizers are designed for low and mid-power applications, while Glan-Lasers – for high-power regimes due to their higher damage threshold and escape window in housing for the deflected ordinary polarized beam. A single MgF2 layer is applied to Glan-type polarizer optical surfaces in order to noticeably maximize their broadband transmission.
| Glan-type polarizers | |
|---|---|
| Extinction ratio (transmitted beam) | α -BBO and YVO4 polarizers: <5 x 10-6 Calcite polarizers: <5 x 10-5 |
| Beam deviation | <3 arcmin |
| Length tolerance | ±0,1 mm |
| Parallelism error | <1 arcmin |
| Surface quality | 20-10 S-D |
| Surface flatness | <λ/4@632,8 nm |
| Coatings | Single MgF2 layer |
| LIDT |
Glan-Taylor polarizers:
|
| Mount | Black anodized aluminum barrel-type mount |
