Multimode UV/VIS Step-Index

Our fibre optic vacuum feedthroughs are constructed with 100, 200, 400, 600 and 1000 μm UV/VIS fibres, they are designed for vacuum applications requiring fibre optic connection from inside a vacuum system to external equipment. The fibre is hermetically sealed into a stainless steel shell using the latest in glass bonding technology and terminates on both vacuum and air side with standard SMA 905 terminations.

Ultra High Vacuum polyimide / aluminium buffered optical fibres are available to meet the demands of UHV environments.

All of our optical fibre is constructed as a core-cladding composite. The core, or the filament that guides the light consists of a thin strand of high transmission fused silica. The cladding consists of an outer layer of doped, lower refractive index fused silica. This two layer design tightly confines the light to the central core of the fibre which
in turn delivers a maximum amount of light at the far end. We also closely control the fibre diameter during the drawing process, allowing the fibre to centre well in connectors and boast a low loss rate.

Features:
• UHV compatible construction
• 100, 200, 400, 600 & 1000 μm UV/VIS fibre
• SMA 905 connector interface
• High temperature rated 250°C
• ConFlat® compatible flange mounts
• KF compatible flange mounts
• Polyimide / aluminium buffered vacuum rated optical cables
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Specifications:
      Materials St.St., Glass, Quartz
Vacuum Range
        CF Flanged  :  atm to 1x10-10Torr
        KF Flanged  :  atm to 1x10-8Torr
Temperature Range*
        CF Flanged  :  -269 to 250°C
        KF Flanged (Viton® seals)  :  -29 to 150°C
        Vacuum Cables  :  -65 to 200°C
        Air cables  :  Up to 80°C
Thermal Gradient  :  25°C/min (max)
Optical Fibre
    Operating wavelength  :  200nm to 800nm
    Bare fibre  :  Pure fused silica core
    Cladding  :  Fluorine doped silica
    Buffer  :  Polyimide / aluminium
    Fibre profile  :  Step-index multimode
    Numerical aperture  :  0.22±0.02 or 24.8°
    Core to cladding ratio:
        Core diameter ≥ 200μm 1:1.1
    Fibre Bend Radius:
        Short term 200 x core diameter
        Long term 400 x core diameter
    Insertion loss of interconnects  :  -0.8dB to -2.0dB
    Power  :  <1W
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* - Assembly rating is reduced to that of the lowest rated