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Features

• 100,000:1 Extinction Ratio
• 2.2 - 4 µm Wavelength Range
• AR-Coated Entrance and Exit Faces for the Entire Wavelength Range

Our Rutile (TiO₂) Polarizers offer extremely pure polarization of light with a 100,000:1 extinction ratio. They are meant for use with lasers in the 2.2 - 4 µm wavelength range and have an air-spaced design. Please note that Rutile Polarizing Prisms are designed to work with well collimated light beams. Divergent beams will produce multiple output beams.

Our Rutile Polarizing Prism's design is similar to an air-spaced Glan-Taylor polarizer, but the Rutile material produces an opposite polarizing effect. When unpolarized light enters the polarizer, the beam is split into two polarized rays at the internal interface. Due to the difference in refractive indices, n_e and n_o, the S-polarized light passes straight through the polarizer without deviation, while P-Polarized light is deflected by total internal reflection and absorbed by the polarizer housing. The output polarization is paralell with the Polarization Axis line on the polarizer housing.

Our rutile polarizers have λ/4 polished optical faces with a Ø5 mm or Ø8 mm clear aperture. Additionally, the entrance and exit faces are AR-Coated over the entire wavelength range. They include a square aluminum housing with the polarization axis clearly marked. The GTR5 has a 9.6 mm square housing, while the GTR8 has a 15.9 mm square housing.

The GTM5 is compatible with the SM05PM5 and PRM05GL5 mounts, while GTM8 is compatible with the SM1PM10 and PRM1GL10 mounts.