Fibre Optic Rotary Joint Model 291

 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.


  • 2 to 9 single mode 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))