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  • xtal stable™ logo

    Ultra-low Brownian noise
    High finesse

    xtal stable™ is our Crystalline Supermirror solution for precision interferometry applications. xtal stable mirrors are employed for the development of ultrastable optical references cavities and advanced inertial navigation systems, yielding cavity end mirrors with record low thermal noise.

    • xtal stable™ icon
    • xtal stable™ icon
    • xtal stable™ icon
    Specifications for xtal stable
    (low brownian noise near-ir passive reflectors
    • Center wavelength:
      900 – 2000 nm
    • Optical absorption:
      <1 ppm (center wavelength dependent)
    • Optical scatter:
      <10 ppm (center wavelength dependent)
    • Diameter:
      0.5-1 inch (12.7-25 mm)*
    • Material:
      GaAs/AlGaAs on desired substrate** (typically fused silica)
    • Surface flatness:
      < 0.10 wave P-V measured @ 633 nm
    • Clear aperture:
      subs. dependent – 5 mm and up
    • Radius of curvature:
      >0.1 m
    • Surface quality (coated optic):
      1 Å RMS roughness
    • S2 Surface:
      AR coatings as required
    • Wedge:
      0.5-1 degree typical (others available)
    • Durability:
      similar to fused silica
  • xtal mir™ logo

    Ultra-high reflectivity at
    mid-infrared wavelengths (2-5 μm)

    xtal mir™ is our Crystalline Supermirror solution for applications in the mid-infrared spectral range, with center wavelengths spanning 2 to 5 µm. These high-performance reflectors are ideal for cavity ringdown spectroscopy systems operating in the all important molecular fingerprint region and also find use in novel long- wavelength laser and optical parametric amplifier (OPA) based light sources.

    • xtal mir™ icon
    • xtal mir™ icon
    • xtal mir™ icon
    Specifications for xtal mir
    (low optical loss mid-ir passive reflectors)
    • Center wavelength:
      2-5 µm
    • Optical losses:
      <200 ppm (total losses, scatter + absorption)
    • Transmission:
      >200 ppm
    • Bandwidth:
      200-400 nm FWHM (center wavelength dependent)
    • Diameter:
      0.5-1 inch (12.7-25 mm)*
    • Material:
      monocrystalline GaAs/AlGaAs on Si**
    • Surface flatness:
      < 0.10 wave P-V measured @ 633 nm
    • Clear aperture:
      subs. dependent – 5 mm and up
    • Radius of curvature:
      >0.1 m
    • Surface quality (coated optic):
      <5 Å RMS roughness
    • S2 Surface:
      AR coatings as required
    • Wedge:
      0.5-1 degree typical (others available)
    • Durability:
      similar to fused silica
  • xtal therm™ logo

    High thermal conductivity

    xtal therm™ is our Crystalline Supermirror solution for high-power and ultrafast laser systems. With a thermal conductivity >30x higher than traditional sputtered coatings, these mirrors offer superior thermal management in harsh environments and are typically integrated with high-performance SiC or diamond substrates. Active functionality (e.g. saturable absorption) may also be realized in these structures.

    • xtal therm™ icon
    • xtal therm™ icon
    • xtal therm™ icon
    Specifications for xtal therm
    (active and passive reflectors for ultrafast and high-power lasers)
    • Center wavelength
      <1300 nm active, up to 4000 nm passive
    • Optical losses:
      <100 ppm (total losses, scatter + absorption)
    • Transmission:
      per customer request
    • Coating Thermal Conductivity:
      >30 W/(m K)
    • Material:
      monocrystalline GaAs/AlGaAs on diamond or SiC**
    • Coating Area:
      max. 5×5 mm2 (single-crystal diamond subs.) , up to 150-mm diam., others*
    • Surface flatness:
      < 0.10 wave P-V measured @ 633 nm
    • Clear aperture:
      subs. dependent – 5 mm and up
    • Radius of curvature:
      >0.1 m
    • Surface quality (coated optic):
      1 Å RMS roughness, surface overcoat optional
    • S2 Surface:
      AR coatings as required
    • Wedge:
      0.5-1 degree typical (others available)
    • Durability
      similar to fused silica
  • xtal custom™ logo

    Customized direct-bonding services

    xtal custom™ is our fully customized solution for direct-bonded components. We can offer tailor-made multilayers consisting of a broad selection of III-V and II-VI material combinations transferred to exotic materials such as diamond and active laser materials (oxide, fluorides, vanadates, garnets, etc.) and can also offer general direct-bonding services for the heterogeneous integration of any number of disparate material systems.

    • xtal custom™ icon
    • xtal custom™ icon
    • xtal custom™ icon