Shaanxi Ireeda Protective Technology Co., Ltd.
Engineer Manager : Ms.Melin
WhatsApp: +8618291418396
E-mail: melin@ireeda.com
Overview
IREEDA Precision Brewster Angle Polarizers are designed for high-performance laser applications requiring exceptional polarization purity and minimal power loss. By utilizing the Brewster Angle (56 degree for K9/Quartz), these polarizers achieve a high extinction ratio by reflecting s-polarized light while transmitting p-polarized light with near-zero reflection.
Engineered with high-purity K9 (BK7) or Synthetic Fused Silica (Quartz), these plates are essential for laser cavity output, intracavity polarization control, and high-power beam splitting. With an extinction ratio exceeding 1000:1, they provide the stability and precision required for scientific research and industrial laser manufacturing.
Highlights
- Superior Polarization Purity, Extinction Ratio > 1000:1.
- Ensure an ultra-pure linear polarization state for sensitive optical systems and high-gain laser resonators.
- High Laser Damage Threshold (LDT).
- Effectively mitigating thermal lens effects and preventing component failure.
- Scientific-Grade Surface Finish.
- Versatile System Integration.
- Perfectly fits standard optical mounts and laser housing architectures.
Technical Specification
| Parameter | Specification Details |
| Product Name | Brewster Angle Polarizer |
| AOI |
56 Degree |
| Extinction Ratio | >1000:1 |
| Surface Quality | 20/10 or 10/5 Scratch-Dig |
| Clear Aperture | >90% of Diameter |
| Surface Flatness | λ/4 @ 632.8nm |
| Transmittance | >97% |
| Thickness Tolerance |
±0.1mm |
| Damage Threshold |
>10J/cm2 |
FAQ
Q1: Why is the 56∘ angle so important for this polarizer?
A: 56∘ is the Brewster angle for K9 and Quartz substrates. At this specific angle, p-polarized light experiences zero reflection at the surface interface. This allows the polarizer to act as a highly efficient filter, reflecting only the s-polarized light and leaving a pure p-polarized transmitted beam.
Q2: Can I use this polarizer at other wavelengths?
A: While the Brewster angle is slightly dependent on the refractive index (which varies with wavelength), these polarizers perform excellently across the visible to NIR spectrum. For specific ultra-precision tasks (e.g., 355nm or 1550nm), we can customize the coating and angle.
Q3: How does this compare to a Wire-Grid or Glan-Thompson polarizer?
A: Unlike absorbing or birefringent polarizers, Brewster Polarizers are thin-film-based, meaning they have a much higher damage threshold and lower cost. They are the preferred choice for high-power industrial lasers where heat dissipation is a concern.
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