Achromatic Quartz-MgF2 Zero-Order Wave Plates provide a much higher degree of retardation accuracy than regular zero-order quartz wave plates. Achromatic Quartz-MgF2 Wave Plates operate over a broad wavelength range, compared to the single wavelength performance of zero-order quartz wave plates.Newports Achromatic Quartz-MgF2 Zero-Order Wave Plates consist of two different birefringent crystals crystalline quartz and magnesium fluoride (MgF2) each with a highly efficient broadband antireflection coating, in an air-spaced design. This construction ensures excellent transmitted wavefront quality, while minimizing beam deviation and surface reflection losses. The assembly is mounted in a black anodized aluminum housing for protection and ease of mounting, with the retarder fast axis marked for alignment reference. Because of the air-space design, our Achromatic Quartz-MgF2 Wave Plates have a higher damage threshold than achromatic polymer film wave plates. Achromatic Quartz-MgF2 Wave Plates are ideal for Ultrafast applications.These Wave Plates are available in λ/4 or λ/2 retardation over five wavelength ranges throughout the visible and near infrared. The standard 25.4 mm outer diameter is convenient for mounting into Newport rotary mounts.
As Ultrafast Amplifiers evolve to higher and higher powers, there is a need for larger diameter optics with broadband performance. The new larger diameter Achromatic Zero-Order Quartz-MgF2 Waveplates address this need. Available in half or quarter wave retardance, the air spaced waveplates offer high damage resistance and low dispersion. Look for part numbers that begin with a 15RPxx-x.
Optimized for the Spectra-Physics InsightTM Laser, the 10RP5x-4 waveplates are designed for a very broad wavelength range of 630-1350 nm. Customers have a choice of λ/2 or λ/4 retardations.
For a tutorial on wave plates, view Polarization
When placed between parallel polarizers, the half wave plate is expected to have no transmission across the full wavelength range. The graphs below show the performance of the the wave plate having less than 0.05% to 1% intensity, depending on the wavelength range.As for the quarter wave plate, that is expected to have 50% transmission when placed between parallel polarizers across the full wavelength range. Looking at the graphs below, the fluctuation between maximum and minimum transmission is small - roughly 50 +/- 5% for the visible wavelength range and only 50 +/- 1% for the IR wavelength range.