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Ultrafast Chirped Mirror, 25.0 mm, 700-900 nm
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In Stock


  • Wavelength Range
    700-900 nm
  • Diameter
    25.0 mm
  • Material
    Fused Silica
  • Coating Type
    Broadband Ultrafast Pulse Coating
  • Surface Quality
    20-10 scratch-dig
  • Surface Flatness
    λ/4 at 632.8 nm
  • Wedge
    < 10 arc min
  • Angle of Incidence
  • Clear Aperture
    ≥ central 80% of diameter
  • Back Surface
    Commercial Polished
  • Reflectivity
    Rp≥ 99.8% @ 700-900 nm
  • Thickness
    6.35 mm
  • Thickness Tolerance
    ±0.1 mm
  • Diameter Tolerance
    +0/-0.1 mm
  • Chamfers
    0.3-0.6 mm face width
  • Chamfers Angle Tolerance
    45° ±15°


High Reflectance for 700 to 900 nm Wavelengths

A multi-layer dielectric coating offers a high reflectance of 99.8% from 700 to 900 nm.

Compensate for Pulse Broadening

Our chirped mirrors have negative group delay dispersion to compensate for ultrafast pulses that have been broadened by transmission through optical components. The degree of compensation may be tuned by reflecting beams multiple times between two or more chirped mirrors.

Very Low Third Order Dispersion

These chirped mirrors offer very low third order dispersion (cubic term) across the specified 700 to 900 nm wavelength range.

Clear Quadrant Mirror Mounts Application

To get the most our of your chirped mirrors, it is imperative that you mount them for optimized performance. Mounting into Newport's patented clear quadrant mounts – such as SN100C-F2K or U100-A2K – will create the closest separation between two mirrors to allow for a large number of bounces between elements (U.S. Patents: 6,304,393; 5,930,057, and 6,016,230).

For Use With Spectra-Physics Lasers

These mirrors are ideal to be used with Spectra-Physics Tsunami®, Mai Tai® or Element 2TM lasers.

Fused Silica Substrates

Fused Silica is synthetic amorphous silicon dioxide of extremely high purity. This non-crystalline, colorless silica glass combines a low content of inclusions with high refractive index homogeneity, a very low thermal expansion coefficient, and excellent transmittance in the wavelength regime from UV to NIR. As a result, these mirrors will perform better with temperature fluctuations and is ideal for high-energy laser applications due to its high energy damage threshold. For more information, please see our Optical Materials technical note.