Fibre Optic Rotary Joints (FORJ)

Fibre-optic rotary joints (FORJs) are the optical equivalent to electric slip rings. They allow for the uninterrupted transmission of optical signals while rotating around their shaft. Fibre-optic rotary joints (FORJs) are widely used in the telecommunications industry and in defence technology, such as with radars, robotic systems, oil drilling, unmanned craft, sensors, and other applications that require continuous rotation.

FORJs are divided into single-channel and multi-channel FORJs. Multi-channel FORJs require a high-precision gear system to provide stable rotation. Princetel’s multi-channel FORJs are also equipped with a unique optical system in order to ensure stable transmission with a high return loss (low reflection). All multi-channel FORJs are sealed for harsh environment application. Our FORJ catalogue is a great way to get started by selecting a suitable FORJ for your individual application. All FORJs and their specifications are summarised in a table, which makes it easy to compare them with each other.

Download summary catalogue

New to fibre optics? Having difficulty understanding the technical terms? Clueless on how to mount a FORJ? Don’t worry, it is simple. Just read through Princetel’s “learning pages” and you’ll become an expert in no time. All our FORJs come from PRINCETEL Inc.

Take me to Princetel’s website so I can learn everything about fibre-optic rotary joints!

Rotary joints

Image Name Number of fibre(s) Fibre type Wavelength length (nm) Insertion loss (dB) Rotation Connectors Temp (C) IP-rating Product sheet
RJn Series 2-10 SM&MM 850-1550 nm <5 dB 100 rpm Pigtail -20C to 65C IP65 forj_rjn.pdf
MJn Series 2-7 SM&MM 850-1550 nm <5 dB 100 rpm ST/FC/PT -20C to 65C IP65-IP68 forj_mjn.pdf
MXn Series 2-3 SM&MM 850-1550 nm <5 dB 200 rpm Pigtail -20C to 65C IP65 MXn_drawing.pdf
RJ2 Series 2 SM&MM 850-1550 nm <6 dB 100 rpm Pigtail -20C to 65C IP65 forj_rj2.pdf
MJ2 Series 2 SM&MM 850-1550 nm <4 dB 100 rpm Pigtail -20C to 65C IP65 forj_mj2.pdf
MJP Series 1 SM&MM 650-1550 nm <2 dB 2000 rpm FC/PC/ -20C to 65C IP65 catalog_forj.pdf
MJx Series 1 SM&MM 650-1550 nm <2 dB 1000 rpm Pigtail -40C to 85C IP68 forj_mjx.pdf
RFCX Series 1 SM&MM 650-1550 nm <3 dB 2000 rpm FC/PC/ -40C to 85C IP68 catalog_forj.pdf
R Series 1 SM&MM 650-1550 nm <2 dB 2000 rpm FC/PC/Pigtail -40C to 85C IP68 forj_rpt.pdf

RJn Series

Number of fibre(s): 2-10
Fibre type: Single Mode & Multi Mode
Wavelength length: 850-1550 nm
Insertion loss: <5 dB
Rotation: 100 rpm
Connectors: Pigtail
Temp: -20C to 65C
IP-rating: IP65

MJn Series

Number of fibre(s): 2-7
Fibre type: Single Mode & Multi Mode
Wavelength length: 850-1550 nm
Insertion loss: <5 dB
Rotation: 100 rpm
Connectors: ST/FC/PT
Temp: -20C to 65C
IP-rating: IP65-IP68

MXn Series

Number of fibre(s): 2-3
Fibre type: Single Mode & Multi Mode
Wavelength length: 850-1550 nm
Insertion loss: <5 dB
Rotation: 200 rpm
Connectors: Pigtail
Temp: -20C to 65C
IP-rating: IP65

RJ2 Series

Number of fibre(s): 2
Fibre type: Single Mode & Multi Mode
Wavelength length: 850-1550 nm
Insertion loss: <6 dB
Rotation: 100 rpm
Connectors: Pigtail
Temp: -20C to 65C
IP-rating: IP65

MJ2 Series

Number of fibre(s): 2
Fibre type: Single Mode & Multi Mode
Wavelength length: 850-1550 nm
Insertion loss: <4 dB
Rotation: 100 rpm
Connectors: Pigtail
Temp: -20C to 65C
IP-rating: IP65

MJP Series

Number of fibre(s): 1
Fibre type: Single Mode & Multi Mode
Wavelength length: 650-1550 nm
Insertion loss: <2 dB
Rotation: 2000 rpm
Connectors: FC/PC/Pigtail
Temp: -20C to 65C
IP-rating: IP65

MJx Series

Number of fibre(s): 1
Fibre type: Single Mode & Multi Mode
Wavelength length: 650-1550 nm
Insertion loss: <2 dB
Rotation: 1000 rpm
Connectors: Pigtail
Temp: -40C to 85C
IP-rating: IP68

RFCX Series

Number of fibre(s): 1
Fibre type: Single Mode & Multi Mode
Wavelength length: 650-1550 nm
Insertion loss: <3 dB
Rotation: 2000 rpm
Connectors: FC/PC/Pigtail
Temp: -40C to 85C
IP-rating: IP68

R Series

Number of fibre(s): 1
Fibre type: Single Mode & Multi Mode
Wavelength length: 650-1550 nm
Insertion loss: <2 dB
Rotation: 2000 rpm
Connectors: FC/PC/Pigtail
Temp: -40C to 85C
IP-rating: IP68

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