Fiber Optic Rotary Joints

FO291

Multi-Channel FORJ FO291 Multi-Channel FORJ

The FO291 is a multi-pass, singlemode fiber optic rotary joint (FORJ). It is passive and bidirectional, and allows the transfer of optical signals across a rotational interface on 2 to 9 separate singlemode optical fibers. 

The FO291 can be combined with our electrical and / or fluid slip rings, giving a single, compact package for optical signals, electrical power and fluid transfer, with ISO 9000 quality.

Other options include fluid-filling for pressure compensation permitting operation at any ocean depth, and the combination of the FO190 to include up to 19 multimode passes.

Features

  • 2 to 9 singlemode channels
  • Can be combined with our electrical slip rings, fluid rotary unions and the FO190 multimode fiber optic rotary joint
  • Alternative drive coupling arrangements are available (consult factory for specification details)
  • Tested to 10,000 psi (69,000 kPa) when fluid-filled
  • Aluminum and stainless steel construction
  • Connectorized interfaces, for easy fiber cable replacement
  • Rugged design
    - MIL-STD-167-1 ship vibration
    - MIL-STD-810F functional shock (40g)

FO291 Specifications

  • Fiber Size (Microns)

    9 / 125 SMF-28

  • Insertion Loss (dB)*

    See Technical Data Sheet

  • Rotation Variation

    Typical < 1.0 dB, maximum < 2.0 dB

  • Back Reflection**

    Typical > 22 dB, minimum > 18 dB

  • Wavelengths

    1310 / 1550 nm. Consult factory for other wavelengths

  • Rotational Speeds

    To 100 rpm dry and 60 rpm fluid filled. Consult factory for higher rotational speeds

  • Temperature

    -40° to +60° C standard. Consult factory for extended range

  • Dispersion

    < 50 fs / nm (calculated)

  • Exterior Surfaces

    Stainless steel and aluminum

  • Vibration

    Tested to MIL-STD-167-1 (Ships)

  • Shock

    Tested to MIL-STD-810F

  • Connectors

    FC / PC connector bushings standard (ST connector bushings optional)

  • Pressure

    Up to 10,000 psi (69,000 kPa) for fluid filled version

  • Pigtail Length

    FORJ is connectorized with FC / PC, ST optional. Pigtail length and connector type optional

*Insertion loss values include fiber cables attached at both ends of the FORJ.
**Lower back reflection available, consult factory.

Typical Applications

  • Remotely operated vehicles
  • Floating production systems
  • Undersea telemetry
  • Seismic streamers
  • Radar antennas
  • Cable reels

FO291 Technical Data Sheet

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