Overview

FORJs are the optical equivalent of an electrical slip ring.  As passive devices, they allow for the low loss transfer of single or multi-mode signals, through rotating interfaces, using optical technology.  Rigorously tested in our environmental test facility and in UKAS accredited test facilities to military vibration standards, our FJ1 FORJ's (Multimode, Single Channel) are implemented in the world's leading wind turbine manufacturer and other high-speed data transfer applications.  The FJ1 range of FORJs are available with ST direct connection or any specified standard connection leads.  Constructed from Stainless Steel, the FORJ range are designed to be chemically resilient and rugged. 
 

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Applications

The BGB series of FORJ’s can be used in many different industries ranging from Renewable Energy such as Wind Turbines, through to Robotics, Mining, Radar, Drone, ROV, Military, Packaging and many other high data transfer technologies.  

Originally designed for the worlds leading wind turbine manufacturer in the early 2000's, our then named 'Optilinc FORJ' opened the way for other variations to be developed and made available to a vast range of industry sectors.
 

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Variations

The Axial Multimode and Singlemode Fibre Optic Rotary Joints have been rigorously tested to EN2591-601, (Aerospace series - Elements of electrical and optical connection Part 601: Optical elements - Insertion loss) and to EIA standards.  Our standard FJ1 popular FORJ range consists of Single Channel Multimode versions.  Other ranges of Singlemode and Multi-channel units (FJ2 & FJ3), Miniature (FJ4), L type (FJ5) and Capacitives (FJ6) are available on request.  Media Converters (FJ7) and Wavelength Division Multiplexers (FJ8) also complement and enhance the BGB range.  
 

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Common Questions

Here are some common terms and questions we get asked or you need to know when buying a BGB FORJ:

1"How many channels do I need with my FORJ?"

This means, how many cables go in and out of the FORJ. You might refer to these as channels", "ways" or "passes".

We can offer single or multiple channels. Most common is single but some customers want 2, 4 or more.

 

2 - "What fibre type do I need to use on my FORJ?"

There are two main types of fibre. These are 9 / 125 also called single mode and 50 / 125 also called multi mode. The 9 or 50 refers to the size of the glass fibre

Some customers might not know their fibre type. If not, check the cable colour or the printed text on the cable. 9 /125 cable is normally yellow and 50 /125 is normally orange.

There are other colours for cables, but yellow and orange are the most common.

The word "Mode" is a common source of confusion for customers. It's a term for how the light travels in the fibre and relates to the core diameter - It has nothing to do with the number of channels.

 

3 - "What cable length and connectors do I need on a Fibre Optic Rotary Joint?"

BGB can supply cables and connectors for any customer need. Connectors are normally 2 letter abbreviations, like ST, SC, LC or FC.

 

4 - "What's the difference between Singlemode and Multimode FORJ"

Multimode fibre has a larger 50 micron diameter core and is most suitable for shorter distances (up to a few km) in industrial, manufacturing and office applications. 

Single-mode fibre has a tiny 9 micron diameter core and is ideal for high bandwidth applications over longer distances up to 100km

 

5 - "What are the Advantages of Using a Fibre Optic Rotary Joint (FORJ)?"

  • Continuous Signal Transmission: Ensures uninterrupted data flow in rotating systems
  • High Bandwidth: Supports large amounts of data transfer
  • Low Signal Loss: Maintains signal integrity over time
  • Compact Design: Suitable for applications with space constraints

 

For further information visit our knowledge section where you can view our Education pieces or click the downloads tab on this page.

 

 

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Downloads

FORJ For The Wind Industry

FORJ: 3 Common FO Connector & Terminations

FORJ: Singlemode & Multimode

FORJ: Basic Operating Principles

BGB FORJ Brochure

FORJ: Scalable Secure Wind Turbine Performance

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