The FO319 is a non-geared, singlemode, compact 2-channel Fiber Optic Rotary Joint (FORJ). It is a passive and bidirectional device which can be used as a standalone device or easily integrated into a rotary assembly, enabling transfer of high data rate optical signals across a rotating interface.


  • Provides rotary coupling for a singlemode fiber link
  • Passive bidirectional device
  • Alternative drive coupling and mounting arrangements are available (consult factory for specification details)
  • Stainless steel housing
  • Ruggedized design
    - MIL-STD-167-1 ship vibration
    - MIL-STD-810 functional shock (40 g)
    - Operating temperature of –46°C to +71°C
  • Junction box version available


  • Can easily be integrated with our standard electrical slip rings, including Hazloc slip rings
  • Redundant channel for single channel applications
  • Two independent bidirectional fiber paths
  • Compact
  • Long life
  • Independent channels
  • No difference in the insertion loss or return loss of either channel
FO319 Specifications 
Fiber Size (Microns) 9/125 SMF-28. Consult factory for other SM fiber types
Wavelength 1270-1620 nm (standard test wavelengths 1310 nm and/or 1550 mn). Consult factor for other wavelengths such as 900-1100 nm band (tested at 1060 nm)
Standard Connectors FC or ST, consult factory for others
Maximum Insertion Loss Over Full Rotation (Includes Rotational Variation)
≤3.5 dB
Insertion Loss Variations
≤1.5 dB
Return Loss
≥20 dB typical. Consult factory for extended
Rotational Speeds 100 rpm standard, consult factory for extended
Service Life
> 30 Million revolutions
Fiber Jacket and Bend Radius
25 mm bend radius standard
Pigtail Length
Up to 3 meters standard. Consult factory for longer lengths
Operating Temperature -46°C to +71°C
Shock 40 g/ 11 ms sawtooth per MIL-STD-810 Method 516
Vibration Per MIL-STD-167-1A, and 7.7 grms, 20 to 2000 Hz per MIL-STD-810 Method 514 E-1
IP Rating Up to IP65

Contact Us

Technical Support

Telephone:  +1-902-468-2263

Typical Applications

  • Remotely Operated Vehicle (ROV) and other marine equipment winches
  • Industrial automation
  • Video surveillance
  • Ground, air and naval radar
  • Electro-Optic (EO) pods
  • Turrets and rotating pedestals
  • High bandwidth cable reels